From: Tim Düsterhus <duesterhus@woltlab.com>
Date: Thu, 2 Jun 2016 22:16:30 +0000 (+0200)
Subject: Install Parsedown via composer
X-Git-Tag: 3.0.0_Beta_1~1539
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2524a9bb37d7ef41b3649508eb03a9b66fd4bdc4;p=GitHub%2FWoltLab%2FWCF.git

Install Parsedown via composer
---

diff --git a/wcfsetup/install/files/lib/system/api/autoload.php b/wcfsetup/install/files/lib/system/api/autoload.php
index 4694b275f6..42e256858d 100644
--- a/wcfsetup/install/files/lib/system/api/autoload.php
+++ b/wcfsetup/install/files/lib/system/api/autoload.php
@@ -4,4 +4,4 @@
 
 require_once __DIR__ . '/composer' . '/autoload_real.php';
 
-return ComposerAutoloaderInitbf0ab6890db693133cef0043fae5b370::getLoader();
+return ComposerAutoloaderInit4a4e0e985ef68770d710dc260edc44ab::getLoader();
diff --git a/wcfsetup/install/files/lib/system/api/composer.json b/wcfsetup/install/files/lib/system/api/composer.json
index 19d6b352a0..59da5a24e3 100644
--- a/wcfsetup/install/files/lib/system/api/composer.json
+++ b/wcfsetup/install/files/lib/system/api/composer.json
@@ -3,6 +3,7 @@
         "vendor-dir": "./"
     },
     "require": {
-        "ezyang/htmlpurifier": "4.7.*"
+        "ezyang/htmlpurifier": "4.7.*",
+        "erusev/parsedown": "1.6.*"
     }
 }
diff --git a/wcfsetup/install/files/lib/system/api/composer.lock b/wcfsetup/install/files/lib/system/api/composer.lock
index 81c8f294c5..78f3be2314 100644
--- a/wcfsetup/install/files/lib/system/api/composer.lock
+++ b/wcfsetup/install/files/lib/system/api/composer.lock
@@ -4,35 +4,47 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "7364a2d47c47ff382d4617f4ac22e35c",
-    "content-hash": "02969f5fb096600e5baaf84af039646e",
+    "hash": "e898b55b2609b488f1b137f6b9dd8d01",
+    "content-hash": "7dabe058d3ef475f63962fe1d5774a34",
     "packages": [
         {
-            "name": "container-interop/container-interop",
-            "version": "1.1.0",
+            "name": "erusev/parsedown",
+            "version": "1.6.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/container-interop/container-interop.git",
-                "reference": "fc08354828f8fd3245f77a66b9e23a6bca48297e"
+                "url": "https://github.com/erusev/parsedown.git",
+                "reference": "3ebbd730b5c2cf5ce78bc1bf64071407fc6674b7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/container-interop/container-interop/zipball/fc08354828f8fd3245f77a66b9e23a6bca48297e",
-                "reference": "fc08354828f8fd3245f77a66b9e23a6bca48297e",
+                "url": "https://api.github.com/repos/erusev/parsedown/zipball/3ebbd730b5c2cf5ce78bc1bf64071407fc6674b7",
+                "reference": "3ebbd730b5c2cf5ce78bc1bf64071407fc6674b7",
                 "shasum": ""
             },
             "type": "library",
             "autoload": {
-                "psr-4": {
-                    "Interop\\Container\\": "src/Interop/Container/"
+                "psr-0": {
+                    "Parsedown": ""
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
                 "MIT"
             ],
-            "description": "Promoting the interoperability of container objects (DIC, SL, etc.)",
-            "time": "2014-12-30 15:22:37"
+            "authors": [
+                {
+                    "name": "Emanuil Rusev",
+                    "email": "hello@erusev.com",
+                    "homepage": "http://erusev.com"
+                }
+            ],
+            "description": "Parser for Markdown.",
+            "homepage": "http://parsedown.org",
+            "keywords": [
+                "markdown",
+                "parser"
+            ],
+            "time": "2015-10-04 16:44:32"
         },
         {
             "name": "ezyang/htmlpurifier",
@@ -77,86 +89,6 @@
                 "html"
             ],
             "time": "2015-08-05 01:03:42"
-        },
-        {
-            "name": "php-di/invoker",
-            "version": "1.2.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/PHP-DI/Invoker.git",
-                "reference": "9949fff87fcf14e8f2ccfbe36dac1e5921944c48"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/PHP-DI/Invoker/zipball/9949fff87fcf14e8f2ccfbe36dac1e5921944c48",
-                "reference": "9949fff87fcf14e8f2ccfbe36dac1e5921944c48",
-                "shasum": ""
-            },
-            "require": {
-                "container-interop/container-interop": "~1.1"
-            },
-            "require-dev": {
-                "athletic/athletic": "~0.1.8",
-                "phpunit/phpunit": "~4.5"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "Invoker\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "description": "Generic and extensible callable invoker",
-            "homepage": "https://github.com/PHP-DI/Invoker",
-            "keywords": [
-                "callable",
-                "dependency",
-                "dependency-injection",
-                "injection",
-                "invoke",
-                "invoker"
-            ],
-            "time": "2015-10-22 19:49:23"
-        },
-        {
-            "name": "php-di/phpdoc-reader",
-            "version": "2.0.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/PHP-DI/PhpDocReader.git",
-                "reference": "21dce5e29f640d655e7b4583ecfb7d166127a5da"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/PHP-DI/PhpDocReader/zipball/21dce5e29f640d655e7b4583ecfb7d166127a5da",
-                "reference": "21dce5e29f640d655e7b4583ecfb7d166127a5da",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3.0"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "~4.6"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "PhpDocReader\\": "src/PhpDocReader"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "description": "PhpDocReader parses @var and @param values in PHP docblocks (supports namespaced class names with the same resolution rules as PHP)",
-            "keywords": [
-                "phpdoc",
-                "reflection"
-            ],
-            "time": "2015-06-01 14:23:20"
         }
     ],
     "packages-dev": [],
diff --git a/wcfsetup/install/files/lib/system/api/composer/ClassLoader.php b/wcfsetup/install/files/lib/system/api/composer/ClassLoader.php
index 5e1469e830..ff6ecfb822 100644
--- a/wcfsetup/install/files/lib/system/api/composer/ClassLoader.php
+++ b/wcfsetup/install/files/lib/system/api/composer/ClassLoader.php
@@ -13,9 +13,7 @@
 namespace Composer\Autoload;
 
 /**
- * ClassLoader implements a PSR-0 class loader
- *
- * See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
  *
  *     $loader = new \Composer\Autoload\ClassLoader();
  *
@@ -39,6 +37,8 @@ namespace Composer\Autoload;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    http://www.php-fig.org/psr/psr-0/
+ * @see    http://www.php-fig.org/psr/psr-4/
  */
 class ClassLoader
 {
@@ -147,7 +147,7 @@ class ClassLoader
      * appending or prepending to the ones previously set for this namespace.
      *
      * @param string       $prefix  The prefix/namespace, with trailing '\\'
-     * @param array|string $paths   The PSR-0 base directories
+     * @param array|string $paths   The PSR-4 base directories
      * @param bool         $prepend Whether to prepend the directories
      *
      * @throws \InvalidArgumentException
diff --git a/wcfsetup/install/files/lib/system/api/composer/LICENSE b/wcfsetup/install/files/lib/system/api/composer/LICENSE
index c8d57af8b2..1a28124886 100644
--- a/wcfsetup/install/files/lib/system/api/composer/LICENSE
+++ b/wcfsetup/install/files/lib/system/api/composer/LICENSE
@@ -1,5 +1,5 @@
 
-Copyright (c) 2015 Nils Adermann, Jordi Boggiano
+Copyright (c) 2016 Nils Adermann, Jordi Boggiano
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/wcfsetup/install/files/lib/system/api/composer/autoload_files.php b/wcfsetup/install/files/lib/system/api/composer/autoload_files.php
index 682ac2e2b4..583a5b7da4 100644
--- a/wcfsetup/install/files/lib/system/api/composer/autoload_files.php
+++ b/wcfsetup/install/files/lib/system/api/composer/autoload_files.php
@@ -6,5 +6,5 @@ $vendorDir = dirname(dirname(__FILE__));
 $baseDir = $vendorDir;
 
 return array(
-    $vendorDir . '/ezyang/htmlpurifier/library/HTMLPurifier.composer.php',
+    '2cffec82183ee1cea088009cef9a6fc3' => $vendorDir . '/ezyang/htmlpurifier/library/HTMLPurifier.composer.php',
 );
diff --git a/wcfsetup/install/files/lib/system/api/composer/autoload_namespaces.php b/wcfsetup/install/files/lib/system/api/composer/autoload_namespaces.php
index 870501a97e..701342db00 100644
--- a/wcfsetup/install/files/lib/system/api/composer/autoload_namespaces.php
+++ b/wcfsetup/install/files/lib/system/api/composer/autoload_namespaces.php
@@ -6,5 +6,6 @@ $vendorDir = dirname(dirname(__FILE__));
 $baseDir = $vendorDir;
 
 return array(
+    'Parsedown' => array($vendorDir . '/erusev/parsedown'),
     'HTMLPurifier' => array($vendorDir . '/ezyang/htmlpurifier/library'),
 );
diff --git a/wcfsetup/install/files/lib/system/api/composer/autoload_psr4.php b/wcfsetup/install/files/lib/system/api/composer/autoload_psr4.php
index 2ccd01ea12..0c50d0a796 100644
--- a/wcfsetup/install/files/lib/system/api/composer/autoload_psr4.php
+++ b/wcfsetup/install/files/lib/system/api/composer/autoload_psr4.php
@@ -6,7 +6,4 @@ $vendorDir = dirname(dirname(__FILE__));
 $baseDir = $vendorDir;
 
 return array(
-    'PhpDocReader\\' => array($vendorDir . '/php-di/phpdoc-reader/src/PhpDocReader'),
-    'Invoker\\' => array($vendorDir . '/php-di/invoker/src'),
-    'Interop\\Container\\' => array($vendorDir . '/container-interop/container-interop/src/Interop/Container'),
 );
diff --git a/wcfsetup/install/files/lib/system/api/composer/autoload_real.php b/wcfsetup/install/files/lib/system/api/composer/autoload_real.php
index cf860b92b3..287ef08662 100644
--- a/wcfsetup/install/files/lib/system/api/composer/autoload_real.php
+++ b/wcfsetup/install/files/lib/system/api/composer/autoload_real.php
@@ -2,7 +2,7 @@
 
 // autoload_real.php @generated by Composer
 
-class ComposerAutoloaderInitbf0ab6890db693133cef0043fae5b370
+class ComposerAutoloaderInit4a4e0e985ef68770d710dc260edc44ab
 {
     private static $loader;
 
@@ -19,37 +19,52 @@ class ComposerAutoloaderInitbf0ab6890db693133cef0043fae5b370
             return self::$loader;
         }
 
-        spl_autoload_register(array('ComposerAutoloaderInitbf0ab6890db693133cef0043fae5b370', 'loadClassLoader'), true, true);
+        spl_autoload_register(array('ComposerAutoloaderInit4a4e0e985ef68770d710dc260edc44ab', 'loadClassLoader'), true, true);
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
-        spl_autoload_unregister(array('ComposerAutoloaderInitbf0ab6890db693133cef0043fae5b370', 'loadClassLoader'));
+        spl_autoload_unregister(array('ComposerAutoloaderInit4a4e0e985ef68770d710dc260edc44ab', 'loadClassLoader'));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+        $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION');
+        if ($useStaticLoader) {
+            require_once __DIR__ . '/autoload_static.php';
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            call_user_func(\Composer\Autoload\ComposerStaticInit4a4e0e985ef68770d710dc260edc44ab::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
+
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
 
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         $loader->register(true);
 
-        $includeFiles = require __DIR__ . '/autoload_files.php';
-        foreach ($includeFiles as $file) {
-            composerRequirebf0ab6890db693133cef0043fae5b370($file);
+        if ($useStaticLoader) {
+            $includeFiles = Composer\Autoload\ComposerStaticInit4a4e0e985ef68770d710dc260edc44ab::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
+        foreach ($includeFiles as $fileIdentifier => $file) {
+            composerRequire4a4e0e985ef68770d710dc260edc44ab($fileIdentifier, $file);
         }
 
         return $loader;
     }
 }
 
-function composerRequirebf0ab6890db693133cef0043fae5b370($file)
+function composerRequire4a4e0e985ef68770d710dc260edc44ab($fileIdentifier, $file)
 {
-    require $file;
+    if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
+        require $file;
+
+        $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
+    }
 }
diff --git a/wcfsetup/install/files/lib/system/api/composer/autoload_static.php b/wcfsetup/install/files/lib/system/api/composer/autoload_static.php
new file mode 100644
index 0000000000..79d01f7cce
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/composer/autoload_static.php
@@ -0,0 +1,37 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInit4a4e0e985ef68770d710dc260edc44ab
+{
+    public static $files = array (
+        '2cffec82183ee1cea088009cef9a6fc3' => __DIR__ . '/..' . '/ezyang/htmlpurifier/library/HTMLPurifier.composer.php',
+    );
+
+    public static $prefixesPsr0 = array (
+        'P' => 
+        array (
+            'Parsedown' => 
+            array (
+                0 => __DIR__ . '/..' . '/erusev/parsedown',
+            ),
+        ),
+        'H' => 
+        array (
+            'HTMLPurifier' => 
+            array (
+                0 => __DIR__ . '/..' . '/ezyang/htmlpurifier/library',
+            ),
+        ),
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixesPsr0 = ComposerStaticInit4a4e0e985ef68770d710dc260edc44ab::$prefixesPsr0;
+
+        }, null, ClassLoader::class);
+    }
+}
diff --git a/wcfsetup/install/files/lib/system/api/composer/installed.json b/wcfsetup/install/files/lib/system/api/composer/installed.json
index 24c222c2b0..9416badb24 100644
--- a/wcfsetup/install/files/lib/system/api/composer/installed.json
+++ b/wcfsetup/install/files/lib/system/api/composer/installed.json
@@ -1,117 +1,4 @@
 [
-    {
-        "name": "php-di/phpdoc-reader",
-        "version": "2.0.0",
-        "version_normalized": "2.0.0.0",
-        "source": {
-            "type": "git",
-            "url": "https://github.com/PHP-DI/PhpDocReader.git",
-            "reference": "21dce5e29f640d655e7b4583ecfb7d166127a5da"
-        },
-        "dist": {
-            "type": "zip",
-            "url": "https://api.github.com/repos/PHP-DI/PhpDocReader/zipball/21dce5e29f640d655e7b4583ecfb7d166127a5da",
-            "reference": "21dce5e29f640d655e7b4583ecfb7d166127a5da",
-            "shasum": ""
-        },
-        "require": {
-            "php": ">=5.3.0"
-        },
-        "require-dev": {
-            "phpunit/phpunit": "~4.6"
-        },
-        "time": "2015-06-01 14:23:20",
-        "type": "library",
-        "installation-source": "dist",
-        "autoload": {
-            "psr-4": {
-                "PhpDocReader\\": "src/PhpDocReader"
-            }
-        },
-        "notification-url": "https://packagist.org/downloads/",
-        "license": [
-            "MIT"
-        ],
-        "description": "PhpDocReader parses @var and @param values in PHP docblocks (supports namespaced class names with the same resolution rules as PHP)",
-        "keywords": [
-            "phpdoc",
-            "reflection"
-        ]
-    },
-    {
-        "name": "container-interop/container-interop",
-        "version": "1.1.0",
-        "version_normalized": "1.1.0.0",
-        "source": {
-            "type": "git",
-            "url": "https://github.com/container-interop/container-interop.git",
-            "reference": "fc08354828f8fd3245f77a66b9e23a6bca48297e"
-        },
-        "dist": {
-            "type": "zip",
-            "url": "https://api.github.com/repos/container-interop/container-interop/zipball/fc08354828f8fd3245f77a66b9e23a6bca48297e",
-            "reference": "fc08354828f8fd3245f77a66b9e23a6bca48297e",
-            "shasum": ""
-        },
-        "time": "2014-12-30 15:22:37",
-        "type": "library",
-        "installation-source": "dist",
-        "autoload": {
-            "psr-4": {
-                "Interop\\Container\\": "src/Interop/Container/"
-            }
-        },
-        "notification-url": "https://packagist.org/downloads/",
-        "license": [
-            "MIT"
-        ],
-        "description": "Promoting the interoperability of container objects (DIC, SL, etc.)"
-    },
-    {
-        "name": "php-di/invoker",
-        "version": "1.2.0",
-        "version_normalized": "1.2.0.0",
-        "source": {
-            "type": "git",
-            "url": "https://github.com/PHP-DI/Invoker.git",
-            "reference": "9949fff87fcf14e8f2ccfbe36dac1e5921944c48"
-        },
-        "dist": {
-            "type": "zip",
-            "url": "https://api.github.com/repos/PHP-DI/Invoker/zipball/9949fff87fcf14e8f2ccfbe36dac1e5921944c48",
-            "reference": "9949fff87fcf14e8f2ccfbe36dac1e5921944c48",
-            "shasum": ""
-        },
-        "require": {
-            "container-interop/container-interop": "~1.1"
-        },
-        "require-dev": {
-            "athletic/athletic": "~0.1.8",
-            "phpunit/phpunit": "~4.5"
-        },
-        "time": "2015-10-22 19:49:23",
-        "type": "library",
-        "installation-source": "dist",
-        "autoload": {
-            "psr-4": {
-                "Invoker\\": "src/"
-            }
-        },
-        "notification-url": "https://packagist.org/downloads/",
-        "license": [
-            "MIT"
-        ],
-        "description": "Generic and extensible callable invoker",
-        "homepage": "https://github.com/PHP-DI/Invoker",
-        "keywords": [
-            "callable",
-            "dependency",
-            "dependency-injection",
-            "injection",
-            "invoke",
-            "invoker"
-        ]
-    },
     {
         "name": "ezyang/htmlpurifier",
         "version": "v4.7.0",
@@ -157,5 +44,46 @@
         "keywords": [
             "html"
         ]
+    },
+    {
+        "name": "erusev/parsedown",
+        "version": "1.6.0",
+        "version_normalized": "1.6.0.0",
+        "source": {
+            "type": "git",
+            "url": "https://github.com/erusev/parsedown.git",
+            "reference": "3ebbd730b5c2cf5ce78bc1bf64071407fc6674b7"
+        },
+        "dist": {
+            "type": "zip",
+            "url": "https://api.github.com/repos/erusev/parsedown/zipball/3ebbd730b5c2cf5ce78bc1bf64071407fc6674b7",
+            "reference": "3ebbd730b5c2cf5ce78bc1bf64071407fc6674b7",
+            "shasum": ""
+        },
+        "time": "2015-10-04 16:44:32",
+        "type": "library",
+        "installation-source": "dist",
+        "autoload": {
+            "psr-0": {
+                "Parsedown": ""
+            }
+        },
+        "notification-url": "https://packagist.org/downloads/",
+        "license": [
+            "MIT"
+        ],
+        "authors": [
+            {
+                "name": "Emanuil Rusev",
+                "email": "hello@erusev.com",
+                "homepage": "http://erusev.com"
+            }
+        ],
+        "description": "Parser for Markdown.",
+        "homepage": "http://parsedown.org",
+        "keywords": [
+            "markdown",
+            "parser"
+        ]
     }
 ]
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/.travis.yml b/wcfsetup/install/files/lib/system/api/erusev/parsedown/.travis.yml
new file mode 100644
index 0000000000..5df49dcb3c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/.travis.yml
@@ -0,0 +1,16 @@
+language: php
+
+php:
+  - 7.0
+  - 5.6
+  - 5.5
+  - 5.4
+  - 5.3
+  - hhvm
+  - hhvm-nightly
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - php: 7.0
+    - php: hhvm-nightly
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/LICENSE.txt b/wcfsetup/install/files/lib/system/api/erusev/parsedown/LICENSE.txt
new file mode 100644
index 0000000000..baca86f5b8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/LICENSE.txt
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Emanuil Rusev, erusev.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/Parsedown.php b/wcfsetup/install/files/lib/system/api/erusev/parsedown/Parsedown.php
new file mode 100644
index 0000000000..c8c92a3924
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/Parsedown.php
@@ -0,0 +1,1528 @@
+<?php
+
+#
+#
+# Parsedown
+# http://parsedown.org
+#
+# (c) Emanuil Rusev
+# http://erusev.com
+#
+# For the full license information, view the LICENSE file that was distributed
+# with this source code.
+#
+#
+
+class Parsedown
+{
+    # ~
+
+    const version = '1.6.0';
+
+    # ~
+
+    function text($text)
+    {
+        # make sure no definitions are set
+        $this->DefinitionData = array();
+
+        # standardize line breaks
+        $text = str_replace(array("\r\n", "\r"), "\n", $text);
+
+        # remove surrounding line breaks
+        $text = trim($text, "\n");
+
+        # split text into lines
+        $lines = explode("\n", $text);
+
+        # iterate through lines to identify blocks
+        $markup = $this->lines($lines);
+
+        # trim line breaks
+        $markup = trim($markup, "\n");
+
+        return $markup;
+    }
+
+    #
+    # Setters
+    #
+
+    function setBreaksEnabled($breaksEnabled)
+    {
+        $this->breaksEnabled = $breaksEnabled;
+
+        return $this;
+    }
+
+    protected $breaksEnabled;
+
+    function setMarkupEscaped($markupEscaped)
+    {
+        $this->markupEscaped = $markupEscaped;
+
+        return $this;
+    }
+
+    protected $markupEscaped;
+
+    function setUrlsLinked($urlsLinked)
+    {
+        $this->urlsLinked = $urlsLinked;
+
+        return $this;
+    }
+
+    protected $urlsLinked = true;
+
+    #
+    # Lines
+    #
+
+    protected $BlockTypes = array(
+        '#' => array('Header'),
+        '*' => array('Rule', 'List'),
+        '+' => array('List'),
+        '-' => array('SetextHeader', 'Table', 'Rule', 'List'),
+        '0' => array('List'),
+        '1' => array('List'),
+        '2' => array('List'),
+        '3' => array('List'),
+        '4' => array('List'),
+        '5' => array('List'),
+        '6' => array('List'),
+        '7' => array('List'),
+        '8' => array('List'),
+        '9' => array('List'),
+        ':' => array('Table'),
+        '<' => array('Comment', 'Markup'),
+        '=' => array('SetextHeader'),
+        '>' => array('Quote'),
+        '[' => array('Reference'),
+        '_' => array('Rule'),
+        '`' => array('FencedCode'),
+        '|' => array('Table'),
+        '~' => array('FencedCode'),
+    );
+
+    # ~
+
+    protected $unmarkedBlockTypes = array(
+        'Code',
+    );
+
+    #
+    # Blocks
+    #
+
+    private function lines(array $lines)
+    {
+        $CurrentBlock = null;
+
+        foreach ($lines as $line)
+        {
+            if (chop($line) === '')
+            {
+                if (isset($CurrentBlock))
+                {
+                    $CurrentBlock['interrupted'] = true;
+                }
+
+                continue;
+            }
+
+            if (strpos($line, "\t") !== false)
+            {
+                $parts = explode("\t", $line);
+
+                $line = $parts[0];
+
+                unset($parts[0]);
+
+                foreach ($parts as $part)
+                {
+                    $shortage = 4 - mb_strlen($line, 'utf-8') % 4;
+
+                    $line .= str_repeat(' ', $shortage);
+                    $line .= $part;
+                }
+            }
+
+            $indent = 0;
+
+            while (isset($line[$indent]) and $line[$indent] === ' ')
+            {
+                $indent ++;
+            }
+
+            $text = $indent > 0 ? substr($line, $indent) : $line;
+
+            # ~
+
+            $Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
+
+            # ~
+
+            if (isset($CurrentBlock['continuable']))
+            {
+                $Block = $this->{'block'.$CurrentBlock['type'].'Continue'}($Line, $CurrentBlock);
+
+                if (isset($Block))
+                {
+                    $CurrentBlock = $Block;
+
+                    continue;
+                }
+                else
+                {
+                    if (method_exists($this, 'block'.$CurrentBlock['type'].'Complete'))
+                    {
+                        $CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
+                    }
+                }
+            }
+
+            # ~
+
+            $marker = $text[0];
+
+            # ~
+
+            $blockTypes = $this->unmarkedBlockTypes;
+
+            if (isset($this->BlockTypes[$marker]))
+            {
+                foreach ($this->BlockTypes[$marker] as $blockType)
+                {
+                    $blockTypes []= $blockType;
+                }
+            }
+
+            #
+            # ~
+
+            foreach ($blockTypes as $blockType)
+            {
+                $Block = $this->{'block'.$blockType}($Line, $CurrentBlock);
+
+                if (isset($Block))
+                {
+                    $Block['type'] = $blockType;
+
+                    if ( ! isset($Block['identified']))
+                    {
+                        $Blocks []= $CurrentBlock;
+
+                        $Block['identified'] = true;
+                    }
+
+                    if (method_exists($this, 'block'.$blockType.'Continue'))
+                    {
+                        $Block['continuable'] = true;
+                    }
+
+                    $CurrentBlock = $Block;
+
+                    continue 2;
+                }
+            }
+
+            # ~
+
+            if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted']))
+            {
+                $CurrentBlock['element']['text'] .= "\n".$text;
+            }
+            else
+            {
+                $Blocks []= $CurrentBlock;
+
+                $CurrentBlock = $this->paragraph($Line);
+
+                $CurrentBlock['identified'] = true;
+            }
+        }
+
+        # ~
+
+        if (isset($CurrentBlock['continuable']) and method_exists($this, 'block'.$CurrentBlock['type'].'Complete'))
+        {
+            $CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
+        }
+
+        # ~
+
+        $Blocks []= $CurrentBlock;
+
+        unset($Blocks[0]);
+
+        # ~
+
+        $markup = '';
+
+        foreach ($Blocks as $Block)
+        {
+            if (isset($Block['hidden']))
+            {
+                continue;
+            }
+
+            $markup .= "\n";
+            $markup .= isset($Block['markup']) ? $Block['markup'] : $this->element($Block['element']);
+        }
+
+        $markup .= "\n";
+
+        # ~
+
+        return $markup;
+    }
+
+    #
+    # Code
+
+    protected function blockCode($Line, $Block = null)
+    {
+        if (isset($Block) and ! isset($Block['type']) and ! isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if ($Line['indent'] >= 4)
+        {
+            $text = substr($Line['body'], 4);
+
+            $Block = array(
+                'element' => array(
+                    'name' => 'pre',
+                    'handler' => 'element',
+                    'text' => array(
+                        'name' => 'code',
+                        'text' => $text,
+                    ),
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockCodeContinue($Line, $Block)
+    {
+        if ($Line['indent'] >= 4)
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['element']['text']['text'] .= "\n";
+
+                unset($Block['interrupted']);
+            }
+
+            $Block['element']['text']['text'] .= "\n";
+
+            $text = substr($Line['body'], 4);
+
+            $Block['element']['text']['text'] .= $text;
+
+            return $Block;
+        }
+    }
+
+    protected function blockCodeComplete($Block)
+    {
+        $text = $Block['element']['text']['text'];
+
+        $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
+
+        $Block['element']['text']['text'] = $text;
+
+        return $Block;
+    }
+
+    #
+    # Comment
+
+    protected function blockComment($Line)
+    {
+        if ($this->markupEscaped)
+        {
+            return;
+        }
+
+        if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!')
+        {
+            $Block = array(
+                'markup' => $Line['body'],
+            );
+
+            if (preg_match('/-->$/', $Line['text']))
+            {
+                $Block['closed'] = true;
+            }
+
+            return $Block;
+        }
+    }
+
+    protected function blockCommentContinue($Line, array $Block)
+    {
+        if (isset($Block['closed']))
+        {
+            return;
+        }
+
+        $Block['markup'] .= "\n" . $Line['body'];
+
+        if (preg_match('/-->$/', $Line['text']))
+        {
+            $Block['closed'] = true;
+        }
+
+        return $Block;
+    }
+
+    #
+    # Fenced Code
+
+    protected function blockFencedCode($Line)
+    {
+        if (preg_match('/^['.$Line['text'][0].']{3,}[ ]*([\w-]+)?[ ]*$/', $Line['text'], $matches))
+        {
+            $Element = array(
+                'name' => 'code',
+                'text' => '',
+            );
+
+            if (isset($matches[1]))
+            {
+                $class = 'language-'.$matches[1];
+
+                $Element['attributes'] = array(
+                    'class' => $class,
+                );
+            }
+
+            $Block = array(
+                'char' => $Line['text'][0],
+                'element' => array(
+                    'name' => 'pre',
+                    'handler' => 'element',
+                    'text' => $Element,
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockFencedCodeContinue($Line, $Block)
+    {
+        if (isset($Block['complete']))
+        {
+            return;
+        }
+
+        if (isset($Block['interrupted']))
+        {
+            $Block['element']['text']['text'] .= "\n";
+
+            unset($Block['interrupted']);
+        }
+
+        if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text']))
+        {
+            $Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1);
+
+            $Block['complete'] = true;
+
+            return $Block;
+        }
+
+        $Block['element']['text']['text'] .= "\n".$Line['body'];;
+
+        return $Block;
+    }
+
+    protected function blockFencedCodeComplete($Block)
+    {
+        $text = $Block['element']['text']['text'];
+
+        $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
+
+        $Block['element']['text']['text'] = $text;
+
+        return $Block;
+    }
+
+    #
+    # Header
+
+    protected function blockHeader($Line)
+    {
+        if (isset($Line['text'][1]))
+        {
+            $level = 1;
+
+            while (isset($Line['text'][$level]) and $Line['text'][$level] === '#')
+            {
+                $level ++;
+            }
+
+            if ($level > 6)
+            {
+                return;
+            }
+
+            $text = trim($Line['text'], '# ');
+
+            $Block = array(
+                'element' => array(
+                    'name' => 'h' . min(6, $level),
+                    'text' => $text,
+                    'handler' => 'line',
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # List
+
+    protected function blockList($Line)
+    {
+        list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]');
+
+        if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'indent' => $Line['indent'],
+                'pattern' => $pattern,
+                'element' => array(
+                    'name' => $name,
+                    'handler' => 'elements',
+                ),
+            );
+
+            $Block['li'] = array(
+                'name' => 'li',
+                'handler' => 'li',
+                'text' => array(
+                    $matches[2],
+                ),
+            );
+
+            $Block['element']['text'] []= & $Block['li'];
+
+            return $Block;
+        }
+    }
+
+    protected function blockListContinue($Line, array $Block)
+    {
+        if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'(?:[ ]+(.*)|$)/', $Line['text'], $matches))
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['li']['text'] []= '';
+
+                unset($Block['interrupted']);
+            }
+
+            unset($Block['li']);
+
+            $text = isset($matches[1]) ? $matches[1] : '';
+
+            $Block['li'] = array(
+                'name' => 'li',
+                'handler' => 'li',
+                'text' => array(
+                    $text,
+                ),
+            );
+
+            $Block['element']['text'] []= & $Block['li'];
+
+            return $Block;
+        }
+
+        if ($Line['text'][0] === '[' and $this->blockReference($Line))
+        {
+            return $Block;
+        }
+
+        if ( ! isset($Block['interrupted']))
+        {
+            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
+
+            $Block['li']['text'] []= $text;
+
+            return $Block;
+        }
+
+        if ($Line['indent'] > 0)
+        {
+            $Block['li']['text'] []= '';
+
+            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
+
+            $Block['li']['text'] []= $text;
+
+            unset($Block['interrupted']);
+
+            return $Block;
+        }
+    }
+
+    #
+    # Quote
+
+    protected function blockQuote($Line)
+    {
+        if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'blockquote',
+                    'handler' => 'lines',
+                    'text' => (array) $matches[1],
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockQuoteContinue($Line, array $Block)
+    {
+        if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
+        {
+            if (isset($Block['interrupted']))
+            {
+                $Block['element']['text'] []= '';
+
+                unset($Block['interrupted']);
+            }
+
+            $Block['element']['text'] []= $matches[1];
+
+            return $Block;
+        }
+
+        if ( ! isset($Block['interrupted']))
+        {
+            $Block['element']['text'] []= $Line['text'];
+
+            return $Block;
+        }
+    }
+
+    #
+    # Rule
+
+    protected function blockRule($Line)
+    {
+        if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text']))
+        {
+            $Block = array(
+                'element' => array(
+                    'name' => 'hr'
+                ),
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Setext
+
+    protected function blockSetextHeader($Line, array $Block = null)
+    {
+        if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if (chop($Line['text'], $Line['text'][0]) === '')
+        {
+            $Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
+
+            return $Block;
+        }
+    }
+
+    #
+    # Markup
+
+    protected function blockMarkup($Line)
+    {
+        if ($this->markupEscaped)
+        {
+            return;
+        }
+
+        if (preg_match('/^<(\w*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches))
+        {
+            $element = strtolower($matches[1]);
+
+            if (in_array($element, $this->textLevelElements))
+            {
+                return;
+            }
+
+            $Block = array(
+                'name' => $matches[1],
+                'depth' => 0,
+                'markup' => $Line['text'],
+            );
+
+            $length = strlen($matches[0]);
+
+            $remainder = substr($Line['text'], $length);
+
+            if (trim($remainder) === '')
+            {
+                if (isset($matches[2]) or in_array($matches[1], $this->voidElements))
+                {
+                    $Block['closed'] = true;
+
+                    $Block['void'] = true;
+                }
+            }
+            else
+            {
+                if (isset($matches[2]) or in_array($matches[1], $this->voidElements))
+                {
+                    return;
+                }
+
+                if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder))
+                {
+                    $Block['closed'] = true;
+                }
+            }
+
+            return $Block;
+        }
+    }
+
+    protected function blockMarkupContinue($Line, array $Block)
+    {
+        if (isset($Block['closed']))
+        {
+            return;
+        }
+
+        if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) # open
+        {
+            $Block['depth'] ++;
+        }
+
+        if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) # close
+        {
+            if ($Block['depth'] > 0)
+            {
+                $Block['depth'] --;
+            }
+            else
+            {
+                $Block['closed'] = true;
+            }
+        }
+
+        if (isset($Block['interrupted']))
+        {
+            $Block['markup'] .= "\n";
+
+            unset($Block['interrupted']);
+        }
+
+        $Block['markup'] .= "\n".$Line['body'];
+
+        return $Block;
+    }
+
+    #
+    # Reference
+
+    protected function blockReference($Line)
+    {
+        if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches))
+        {
+            $id = strtolower($matches[1]);
+
+            $Data = array(
+                'url' => $matches[2],
+                'title' => null,
+            );
+
+            if (isset($matches[3]))
+            {
+                $Data['title'] = $matches[3];
+            }
+
+            $this->DefinitionData['Reference'][$id] = $Data;
+
+            $Block = array(
+                'hidden' => true,
+            );
+
+            return $Block;
+        }
+    }
+
+    #
+    # Table
+
+    protected function blockTable($Line, array $Block = null)
+    {
+        if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '')
+        {
+            $alignments = array();
+
+            $divider = $Line['text'];
+
+            $divider = trim($divider);
+            $divider = trim($divider, '|');
+
+            $dividerCells = explode('|', $divider);
+
+            foreach ($dividerCells as $dividerCell)
+            {
+                $dividerCell = trim($dividerCell);
+
+                if ($dividerCell === '')
+                {
+                    continue;
+                }
+
+                $alignment = null;
+
+                if ($dividerCell[0] === ':')
+                {
+                    $alignment = 'left';
+                }
+
+                if (substr($dividerCell, - 1) === ':')
+                {
+                    $alignment = $alignment === 'left' ? 'center' : 'right';
+                }
+
+                $alignments []= $alignment;
+            }
+
+            # ~
+
+            $HeaderElements = array();
+
+            $header = $Block['element']['text'];
+
+            $header = trim($header);
+            $header = trim($header, '|');
+
+            $headerCells = explode('|', $header);
+
+            foreach ($headerCells as $index => $headerCell)
+            {
+                $headerCell = trim($headerCell);
+
+                $HeaderElement = array(
+                    'name' => 'th',
+                    'text' => $headerCell,
+                    'handler' => 'line',
+                );
+
+                if (isset($alignments[$index]))
+                {
+                    $alignment = $alignments[$index];
+
+                    $HeaderElement['attributes'] = array(
+                        'style' => 'text-align: '.$alignment.';',
+                    );
+                }
+
+                $HeaderElements []= $HeaderElement;
+            }
+
+            # ~
+
+            $Block = array(
+                'alignments' => $alignments,
+                'identified' => true,
+                'element' => array(
+                    'name' => 'table',
+                    'handler' => 'elements',
+                ),
+            );
+
+            $Block['element']['text'] []= array(
+                'name' => 'thead',
+                'handler' => 'elements',
+            );
+
+            $Block['element']['text'] []= array(
+                'name' => 'tbody',
+                'handler' => 'elements',
+                'text' => array(),
+            );
+
+            $Block['element']['text'][0]['text'] []= array(
+                'name' => 'tr',
+                'handler' => 'elements',
+                'text' => $HeaderElements,
+            );
+
+            return $Block;
+        }
+    }
+
+    protected function blockTableContinue($Line, array $Block)
+    {
+        if (isset($Block['interrupted']))
+        {
+            return;
+        }
+
+        if ($Line['text'][0] === '|' or strpos($Line['text'], '|'))
+        {
+            $Elements = array();
+
+            $row = $Line['text'];
+
+            $row = trim($row);
+            $row = trim($row, '|');
+
+            preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches);
+
+            foreach ($matches[0] as $index => $cell)
+            {
+                $cell = trim($cell);
+
+                $Element = array(
+                    'name' => 'td',
+                    'handler' => 'line',
+                    'text' => $cell,
+                );
+
+                if (isset($Block['alignments'][$index]))
+                {
+                    $Element['attributes'] = array(
+                        'style' => 'text-align: '.$Block['alignments'][$index].';',
+                    );
+                }
+
+                $Elements []= $Element;
+            }
+
+            $Element = array(
+                'name' => 'tr',
+                'handler' => 'elements',
+                'text' => $Elements,
+            );
+
+            $Block['element']['text'][1]['text'] []= $Element;
+
+            return $Block;
+        }
+    }
+
+    #
+    # ~
+    #
+
+    protected function paragraph($Line)
+    {
+        $Block = array(
+            'element' => array(
+                'name' => 'p',
+                'text' => $Line['text'],
+                'handler' => 'line',
+            ),
+        );
+
+        return $Block;
+    }
+
+    #
+    # Inline Elements
+    #
+
+    protected $InlineTypes = array(
+        '"' => array('SpecialCharacter'),
+        '!' => array('Image'),
+        '&' => array('SpecialCharacter'),
+        '*' => array('Emphasis'),
+        ':' => array('Url'),
+        '<' => array('UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'),
+        '>' => array('SpecialCharacter'),
+        '[' => array('Link'),
+        '_' => array('Emphasis'),
+        '`' => array('Code'),
+        '~' => array('Strikethrough'),
+        '\\' => array('EscapeSequence'),
+    );
+
+    # ~
+
+    protected $inlineMarkerList = '!"*_&[:<>`~\\';
+
+    #
+    # ~
+    #
+
+    public function line($text)
+    {
+        $markup = '';
+
+        # $excerpt is based on the first occurrence of a marker
+
+        while ($excerpt = strpbrk($text, $this->inlineMarkerList))
+        {
+            $marker = $excerpt[0];
+
+            $markerPosition = strpos($text, $marker);
+
+            $Excerpt = array('text' => $excerpt, 'context' => $text);
+
+            foreach ($this->InlineTypes[$marker] as $inlineType)
+            {
+                $Inline = $this->{'inline'.$inlineType}($Excerpt);
+
+                if ( ! isset($Inline))
+                {
+                    continue;
+                }
+
+                # makes sure that the inline belongs to "our" marker
+
+                if (isset($Inline['position']) and $Inline['position'] > $markerPosition)
+                {
+                    continue;
+                }
+
+                # sets a default inline position
+
+                if ( ! isset($Inline['position']))
+                {
+                    $Inline['position'] = $markerPosition;
+                }
+
+                # the text that comes before the inline
+                $unmarkedText = substr($text, 0, $Inline['position']);
+
+                # compile the unmarked text
+                $markup .= $this->unmarkedText($unmarkedText);
+
+                # compile the inline
+                $markup .= isset($Inline['markup']) ? $Inline['markup'] : $this->element($Inline['element']);
+
+                # remove the examined text
+                $text = substr($text, $Inline['position'] + $Inline['extent']);
+
+                continue 2;
+            }
+
+            # the marker does not belong to an inline
+
+            $unmarkedText = substr($text, 0, $markerPosition + 1);
+
+            $markup .= $this->unmarkedText($unmarkedText);
+
+            $text = substr($text, $markerPosition + 1);
+        }
+
+        $markup .= $this->unmarkedText($text);
+
+        return $markup;
+    }
+
+    #
+    # ~
+    #
+
+    protected function inlineCode($Excerpt)
+    {
+        $marker = $Excerpt['text'][0];
+
+        if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/s', $Excerpt['text'], $matches))
+        {
+            $text = $matches[2];
+            $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
+            $text = preg_replace("/[ ]*\n/", ' ', $text);
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'code',
+                    'text' => $text,
+                ),
+            );
+        }
+    }
+
+    protected function inlineEmailTag($Excerpt)
+    {
+        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<((mailto:)?\S+?@\S+?)>/i', $Excerpt['text'], $matches))
+        {
+            $url = $matches[1];
+
+            if ( ! isset($matches[2]))
+            {
+                $url = 'mailto:' . $url;
+            }
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $matches[1],
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+        }
+    }
+
+    protected function inlineEmphasis($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]))
+        {
+            return;
+        }
+
+        $marker = $Excerpt['text'][0];
+
+        if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches))
+        {
+            $emphasis = 'strong';
+        }
+        elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches))
+        {
+            $emphasis = 'em';
+        }
+        else
+        {
+            return;
+        }
+
+        return array(
+            'extent' => strlen($matches[0]),
+            'element' => array(
+                'name' => $emphasis,
+                'handler' => 'line',
+                'text' => $matches[1],
+            ),
+        );
+    }
+
+    protected function inlineEscapeSequence($Excerpt)
+    {
+        if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters))
+        {
+            return array(
+                'markup' => $Excerpt['text'][1],
+                'extent' => 2,
+            );
+        }
+    }
+
+    protected function inlineImage($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '[')
+        {
+            return;
+        }
+
+        $Excerpt['text']= substr($Excerpt['text'], 1);
+
+        $Link = $this->inlineLink($Excerpt);
+
+        if ($Link === null)
+        {
+            return;
+        }
+
+        $Inline = array(
+            'extent' => $Link['extent'] + 1,
+            'element' => array(
+                'name' => 'img',
+                'attributes' => array(
+                    'src' => $Link['element']['attributes']['href'],
+                    'alt' => $Link['element']['text'],
+                ),
+            ),
+        );
+
+        $Inline['element']['attributes'] += $Link['element']['attributes'];
+
+        unset($Inline['element']['attributes']['href']);
+
+        return $Inline;
+    }
+
+    protected function inlineLink($Excerpt)
+    {
+        $Element = array(
+            'name' => 'a',
+            'handler' => 'line',
+            'text' => null,
+            'attributes' => array(
+                'href' => null,
+                'title' => null,
+            ),
+        );
+
+        $extent = 0;
+
+        $remainder = $Excerpt['text'];
+
+        if (preg_match('/\[((?:[^][]|(?R))*)\]/', $remainder, $matches))
+        {
+            $Element['text'] = $matches[1];
+
+            $extent += strlen($matches[0]);
+
+            $remainder = substr($remainder, $extent);
+        }
+        else
+        {
+            return;
+        }
+
+        if (preg_match('/^[(]((?:[^ ()]|[(][^ )]+[)])+)(?:[ ]+("[^"]*"|\'[^\']*\'))?[)]/', $remainder, $matches))
+        {
+            $Element['attributes']['href'] = $matches[1];
+
+            if (isset($matches[2]))
+            {
+                $Element['attributes']['title'] = substr($matches[2], 1, - 1);
+            }
+
+            $extent += strlen($matches[0]);
+        }
+        else
+        {
+            if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches))
+            {
+                $definition = strlen($matches[1]) ? $matches[1] : $Element['text'];
+                $definition = strtolower($definition);
+
+                $extent += strlen($matches[0]);
+            }
+            else
+            {
+                $definition = strtolower($Element['text']);
+            }
+
+            if ( ! isset($this->DefinitionData['Reference'][$definition]))
+            {
+                return;
+            }
+
+            $Definition = $this->DefinitionData['Reference'][$definition];
+
+            $Element['attributes']['href'] = $Definition['url'];
+            $Element['attributes']['title'] = $Definition['title'];
+        }
+
+        $Element['attributes']['href'] = str_replace(array('&', '<'), array('&amp;', '&lt;'), $Element['attributes']['href']);
+
+        return array(
+            'extent' => $extent,
+            'element' => $Element,
+        );
+    }
+
+    protected function inlineMarkup($Excerpt)
+    {
+        if ($this->markupEscaped or strpos($Excerpt['text'], '>') === false)
+        {
+            return;
+        }
+
+        if ($Excerpt['text'][1] === '/' and preg_match('/^<\/\w*[ ]*>/s', $Excerpt['text'], $matches))
+        {
+            return array(
+                'markup' => $matches[0],
+                'extent' => strlen($matches[0]),
+            );
+        }
+
+        if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?[^-])*-->/s', $Excerpt['text'], $matches))
+        {
+            return array(
+                'markup' => $matches[0],
+                'extent' => strlen($matches[0]),
+            );
+        }
+
+        if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w*(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*\/?>/s', $Excerpt['text'], $matches))
+        {
+            return array(
+                'markup' => $matches[0],
+                'extent' => strlen($matches[0]),
+            );
+        }
+    }
+
+    protected function inlineSpecialCharacter($Excerpt)
+    {
+        if ($Excerpt['text'][0] === '&' and ! preg_match('/^&#?\w+;/', $Excerpt['text']))
+        {
+            return array(
+                'markup' => '&amp;',
+                'extent' => 1,
+            );
+        }
+
+        $SpecialCharacter = array('>' => 'gt', '<' => 'lt', '"' => 'quot');
+
+        if (isset($SpecialCharacter[$Excerpt['text'][0]]))
+        {
+            return array(
+                'markup' => '&'.$SpecialCharacter[$Excerpt['text'][0]].';',
+                'extent' => 1,
+            );
+        }
+    }
+
+    protected function inlineStrikethrough($Excerpt)
+    {
+        if ( ! isset($Excerpt['text'][1]))
+        {
+            return;
+        }
+
+        if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches))
+        {
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'del',
+                    'text' => $matches[1],
+                    'handler' => 'line',
+                ),
+            );
+        }
+    }
+
+    protected function inlineUrl($Excerpt)
+    {
+        if ($this->urlsLinked !== true or ! isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/')
+        {
+            return;
+        }
+
+        if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE))
+        {
+            $Inline = array(
+                'extent' => strlen($matches[0][0]),
+                'position' => $matches[0][1],
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $matches[0][0],
+                    'attributes' => array(
+                        'href' => $matches[0][0],
+                    ),
+                ),
+            );
+
+            return $Inline;
+        }
+    }
+
+    protected function inlineUrlTag($Excerpt)
+    {
+        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\w+:\/{2}[^ >]+)>/i', $Excerpt['text'], $matches))
+        {
+            $url = str_replace(array('&', '<'), array('&amp;', '&lt;'), $matches[1]);
+
+            return array(
+                'extent' => strlen($matches[0]),
+                'element' => array(
+                    'name' => 'a',
+                    'text' => $url,
+                    'attributes' => array(
+                        'href' => $url,
+                    ),
+                ),
+            );
+        }
+    }
+
+    # ~
+
+    protected function unmarkedText($text)
+    {
+        if ($this->breaksEnabled)
+        {
+            $text = preg_replace('/[ ]*\n/', "<br />\n", $text);
+        }
+        else
+        {
+            $text = preg_replace('/(?:[ ][ ]+|[ ]*\\\\)\n/', "<br />\n", $text);
+            $text = str_replace(" \n", "\n", $text);
+        }
+
+        return $text;
+    }
+
+    #
+    # Handlers
+    #
+
+    protected function element(array $Element)
+    {
+        $markup = '<'.$Element['name'];
+
+        if (isset($Element['attributes']))
+        {
+            foreach ($Element['attributes'] as $name => $value)
+            {
+                if ($value === null)
+                {
+                    continue;
+                }
+
+                $markup .= ' '.$name.'="'.$value.'"';
+            }
+        }
+
+        if (isset($Element['text']))
+        {
+            $markup .= '>';
+
+            if (isset($Element['handler']))
+            {
+                $markup .= $this->{$Element['handler']}($Element['text']);
+            }
+            else
+            {
+                $markup .= $Element['text'];
+            }
+
+            $markup .= '</'.$Element['name'].'>';
+        }
+        else
+        {
+            $markup .= ' />';
+        }
+
+        return $markup;
+    }
+
+    protected function elements(array $Elements)
+    {
+        $markup = '';
+
+        foreach ($Elements as $Element)
+        {
+            $markup .= "\n" . $this->element($Element);
+        }
+
+        $markup .= "\n";
+
+        return $markup;
+    }
+
+    # ~
+
+    protected function li($lines)
+    {
+        $markup = $this->lines($lines);
+
+        $trimmedMarkup = trim($markup);
+
+        if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '<p>')
+        {
+            $markup = $trimmedMarkup;
+            $markup = substr($markup, 3);
+
+            $position = strpos($markup, "</p>");
+
+            $markup = substr_replace($markup, '', $position, 4);
+        }
+
+        return $markup;
+    }
+
+    #
+    # Deprecated Methods
+    #
+
+    function parse($text)
+    {
+        $markup = $this->text($text);
+
+        return $markup;
+    }
+
+    #
+    # Static Methods
+    #
+
+    static function instance($name = 'default')
+    {
+        if (isset(self::$instances[$name]))
+        {
+            return self::$instances[$name];
+        }
+
+        $instance = new static();
+
+        self::$instances[$name] = $instance;
+
+        return $instance;
+    }
+
+    private static $instances = array();
+
+    #
+    # Fields
+    #
+
+    protected $DefinitionData;
+
+    #
+    # Read-Only
+
+    protected $specialCharacters = array(
+        '\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|',
+    );
+
+    protected $StrongRegex = array(
+        '*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
+        '_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us',
+    );
+
+    protected $EmRegex = array(
+        '*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
+        '_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us',
+    );
+
+    protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?';
+
+    protected $voidElements = array(
+        'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source',
+    );
+
+    protected $textLevelElements = array(
+        'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
+        'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
+        'i', 'rp', 'del', 'code',          'strike', 'marquee',
+        'q', 'rt', 'ins', 'font',          'strong',
+        's', 'tt', 'sub', 'mark',
+        'u', 'xm', 'sup', 'nobr',
+                   'var', 'ruby',
+                   'wbr', 'span',
+                          'time',
+    );
+}
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/README.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/README.md
new file mode 100644
index 0000000000..6f9f649856
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/README.md
@@ -0,0 +1,57 @@
+## Parsedown
+
+[![Build Status](https://img.shields.io/travis/erusev/parsedown/master.svg?style=flat-square)](https://travis-ci.org/erusev/parsedown)
+<!--[![Total Downloads](http://img.shields.io/packagist/dt/erusev/parsedown.svg?style=flat-square)](https://packagist.org/packages/erusev/parsedown)-->
+
+Better Markdown Parser in PHP
+
+[Demo](http://parsedown.org/demo) |
+[Benchmarks](http://parsedown.org/speed) |
+[Tests](http://parsedown.org/tests/) |
+[Documentation](https://github.com/erusev/parsedown/wiki/)
+
+### Features
+
+* Super Fast
+* [GitHub flavored](https://help.github.com/articles/github-flavored-markdown)
+* Extensible
+* Tested in 5.3 to 5.6
+* [Markdown Extra extension](https://github.com/erusev/parsedown-extra)
+
+### Installation
+
+Include `Parsedown.php` or install [the composer package](https://packagist.org/packages/erusev/parsedown).
+
+### Example
+
+``` php
+$Parsedown = new Parsedown();
+
+echo $Parsedown->text('Hello _Parsedown_!'); # prints: <p>Hello <em>Parsedown</em>!</p>
+```
+
+More examples in [the wiki](https://github.com/erusev/parsedown/wiki/) and in [this video tutorial](http://youtu.be/wYZBY8DEikI).
+
+### Questions
+
+**How does Parsedown work?**
+
+It tries to read Markdown like a human. First, it looks at the lines. It’s interested in how the lines start. This helps it recognise blocks. It knows, for example, that if a line start with a `-` then it perhaps belong to a list. Once it recognises the blocks, it continues to the content. As it reads, it watches out for special characters. This helps it recognise inline elements (or inlines).
+
+We call this approach "line based". We believe that Parsedown is the first Markdown parser to use it. Since the release of Parsedown, other developers have used the same approach to develop other Markdown parsers in PHP and in other languages.
+
+**Is it compliant with CommonMark?**
+
+It passes most of the CommonMark tests. Most of the tests that don't pass deal with cases that are quite uncommon. Still, as CommonMark matures, compliance should improve.
+
+**Who uses it?**
+
+[phpDocumentor](http://www.phpdoc.org/), [October CMS](http://octobercms.com/), [Bolt CMS](http://bolt.cm/), [Kirby CMS](http://getkirby.com/), [Grav CMS](http://getgrav.org/), [Statamic CMS](http://www.statamic.com/),  [RaspberryPi.org](http://www.raspberrypi.org/) and [more](https://www.versioneye.com/php/erusev:parsedown/references).
+
+**How can I help?**
+
+Use it, star it, share it and if you feel generous, [donate](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=528P3NZQMP8N2).
+
+---
+
+You might also like [Caret](http://caret.io) - our Markdown editor for the desktop.
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/composer.json b/wcfsetup/install/files/lib/system/api/erusev/parsedown/composer.json
new file mode 100644
index 0000000000..1439b824dd
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/composer.json
@@ -0,0 +1,18 @@
+{
+    "name": "erusev/parsedown",
+    "description": "Parser for Markdown.",
+    "keywords": ["markdown", "parser"],
+    "homepage": "http://parsedown.org",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Emanuil Rusev",
+            "email": "hello@erusev.com",
+            "homepage": "http://erusev.com"
+        }
+    ],
+    "autoload": {
+        "psr-0": {"Parsedown": ""}
+    }
+}
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/phpunit.xml.dist b/wcfsetup/install/files/lib/system/api/erusev/parsedown/phpunit.xml.dist
new file mode 100644
index 0000000000..b2d5e9d4fe
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/phpunit.xml.dist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="test/bootstrap.php" colors="true">
+	<testsuites>
+		<testsuite>
+			<file>test/ParsedownTest.php</file>
+		</testsuite>
+	</testsuites>
+</phpunit>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/CommonMarkTest.php b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/CommonMarkTest.php
new file mode 100644
index 0000000000..9b8d116209
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/CommonMarkTest.php
@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * Test Parsedown against the CommonMark spec.
+ *
+ * Some code based on the original JavaScript test runner by jgm.
+ *
+ * @link http://commonmark.org/ CommonMark
+ * @link http://git.io/8WtRvQ JavaScript test runner
+ */
+class CommonMarkTest extends PHPUnit_Framework_TestCase
+{
+    const SPEC_URL = 'https://raw.githubusercontent.com/jgm/stmd/master/spec.txt';
+
+    /**
+     * @dataProvider data
+     * @param $section
+     * @param $markdown
+     * @param $expectedHtml
+     */
+    function test_($section, $markdown, $expectedHtml)
+    {
+        $Parsedown = new Parsedown();
+        $Parsedown->setUrlsLinked(false);
+
+        $actualHtml = $Parsedown->text($markdown);
+        $actualHtml = $this->normalizeMarkup($actualHtml);
+
+        $this->assertEquals($expectedHtml, $actualHtml);
+    }
+
+    function data()
+    {
+        $spec = file_get_contents(self::SPEC_URL);
+        $spec = strstr($spec, '<!-- END TESTS -->', true);
+
+        $tests = array();
+        $currentSection = '';
+
+        preg_replace_callback(
+            '/^\.\n([\s\S]*?)^\.\n([\s\S]*?)^\.$|^#{1,6} *(.*)$/m',
+            function($matches) use ( & $tests, & $currentSection, & $testCount) {
+                if (isset($matches[3]) and $matches[3]) {
+                    $currentSection = $matches[3];
+                } else {
+                    $testCount++;
+                    $markdown = $matches[1];
+                    $markdown = preg_replace('/→/', "\t", $markdown);
+                    $expectedHtml = $matches[2];
+                    $expectedHtml = $this->normalizeMarkup($expectedHtml);
+                    $tests []= array(
+                        $currentSection, # section
+                        $markdown, # markdown
+                        $expectedHtml, # html
+                    );
+                }
+            },
+            $spec
+        );
+
+        return $tests;
+    }
+
+    private function normalizeMarkup($markup)
+    {
+        $markup = preg_replace("/\n+/", "\n", $markup);
+        $markup = preg_replace('/^\s+/m', '', $markup);
+        $markup = preg_replace('/^((?:<[\w]+>)+)\n/m', '$1', $markup);
+        $markup = preg_replace('/\n((?:<\/[\w]+>)+)$/m', '$1', $markup);
+        $markup = trim($markup);
+
+        return $markup;
+    }
+}
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/ParsedownTest.php b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/ParsedownTest.php
new file mode 100644
index 0000000000..c922ab1f2b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/ParsedownTest.php
@@ -0,0 +1,159 @@
+<?php
+
+class ParsedownTest extends PHPUnit_Framework_TestCase
+{
+    final function __construct($name = null, array $data = array(), $dataName = '')
+    {
+        $this->dirs = $this->initDirs();
+        $this->Parsedown = $this->initParsedown();
+
+        parent::__construct($name, $data, $dataName);
+    }
+
+    private $dirs, $Parsedown;
+
+    /**
+     * @return array
+     */
+    protected function initDirs()
+    {
+        $dirs []= dirname(__FILE__).'/data/';
+
+        return $dirs;
+    }
+
+    /**
+     * @return Parsedown
+     */
+    protected function initParsedown()
+    {
+        $Parsedown = new Parsedown();
+
+        return $Parsedown;
+    }
+
+    /**
+     * @dataProvider data
+     * @param $test
+     * @param $dir
+     */
+    function test_($test, $dir)
+    {
+        $markdown = file_get_contents($dir . $test . '.md');
+
+        $expectedMarkup = file_get_contents($dir . $test . '.html');
+
+        $expectedMarkup = str_replace("\r\n", "\n", $expectedMarkup);
+        $expectedMarkup = str_replace("\r", "\n", $expectedMarkup);
+
+        $actualMarkup = $this->Parsedown->text($markdown);
+
+        $this->assertEquals($expectedMarkup, $actualMarkup);
+    }
+
+    function data()
+    {
+        $data = array();
+
+        foreach ($this->dirs as $dir)
+        {
+            $Folder = new DirectoryIterator($dir);
+
+            foreach ($Folder as $File)
+            {
+                /** @var $File DirectoryIterator */
+
+                if ( ! $File->isFile())
+                {
+                    continue;
+                }
+
+                $filename = $File->getFilename();
+
+                $extension = pathinfo($filename, PATHINFO_EXTENSION);
+
+                if ($extension !== 'md')
+                {
+                    continue;
+                }
+
+                $basename = $File->getBasename('.md');
+
+                if (file_exists($dir . $basename . '.html'))
+                {
+                    $data []= array($basename, $dir);
+                }
+            }
+        }
+
+        return $data;
+    }
+
+    public function test_no_markup()
+    {
+        $markdownWithHtml = <<<MARKDOWN_WITH_MARKUP
+<div>_content_</div>
+
+sparse:
+
+<div>
+<div class="inner">
+_content_
+</div>
+</div>
+
+paragraph
+
+<style type="text/css">
+    p {
+        color: red;
+    }
+</style>
+
+comment
+
+<!-- html comment -->
+MARKDOWN_WITH_MARKUP;
+
+        $expectedHtml = <<<EXPECTED_HTML
+<p>&lt;div&gt;<em>content</em>&lt;/div&gt;</p>
+<p>sparse:</p>
+<p>&lt;div&gt;
+&lt;div class=&quot;inner&quot;&gt;
+<em>content</em>
+&lt;/div&gt;
+&lt;/div&gt;</p>
+<p>paragraph</p>
+<p>&lt;style type=&quot;text/css&quot;&gt;
+p {
+color: red;
+}
+&lt;/style&gt;</p>
+<p>comment</p>
+<p>&lt;!-- html comment --&gt;</p>
+EXPECTED_HTML;
+        $parsedownWithNoMarkup = new Parsedown();
+        $parsedownWithNoMarkup->setMarkupEscaped(true);
+        $this->assertEquals($expectedHtml, $parsedownWithNoMarkup->text($markdownWithHtml));
+    }
+
+    public function testLateStaticBinding()
+    {
+        include 'test/TestParsedown.php';
+
+        $parsedown = Parsedown::instance();
+        $this->assertInstanceOf('Parsedown', $parsedown);
+
+        // After instance is already called on Parsedown
+        // subsequent calls with the same arguments return the same instance
+        $sameParsedown = TestParsedown::instance();
+        $this->assertInstanceOf('Parsedown', $sameParsedown);
+        $this->assertSame($parsedown, $sameParsedown);
+
+        $testParsedown = TestParsedown::instance('test late static binding');
+        $this->assertInstanceOf('TestParsedown', $testParsedown);
+
+        $sameInstanceAgain = TestParsedown::instance('test late static binding');
+        $this->assertSame($testParsedown, $sameInstanceAgain);
+    }
+}
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/TestParsedown.php b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/TestParsedown.php
new file mode 100644
index 0000000000..7024dfbccd
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/TestParsedown.php
@@ -0,0 +1,5 @@
+<?php
+
+class TestParsedown extends Parsedown
+{
+}
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/bootstrap.php b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/bootstrap.php
new file mode 100644
index 0000000000..5f264d2f26
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/bootstrap.php
@@ -0,0 +1,3 @@
+<?php
+
+include 'Parsedown.php';
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aesthetic_table.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aesthetic_table.html
new file mode 100644
index 0000000000..88e1c2bd44
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aesthetic_table.html
@@ -0,0 +1,18 @@
+<table>
+<thead>
+<tr>
+<th>header 1</th>
+<th>header 2</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>cell 1.1</td>
+<td>cell 1.2</td>
+</tr>
+<tr>
+<td>cell 2.1</td>
+<td>cell 2.2</td>
+</tr>
+</tbody>
+</table>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aesthetic_table.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aesthetic_table.md
new file mode 100644
index 0000000000..5245e6c9dd
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aesthetic_table.md
@@ -0,0 +1,4 @@
+| header 1 | header 2 |
+| -------- | -------- |
+| cell 1.1 | cell 1.2 |
+| cell 2.1 | cell 2.2 |
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aligned_table.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aligned_table.html
new file mode 100644
index 0000000000..c4acfcb68c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aligned_table.html
@@ -0,0 +1,21 @@
+<table>
+<thead>
+<tr>
+<th style="text-align: left;">header 1</th>
+<th style="text-align: center;">header 2</th>
+<th style="text-align: right;">header 2</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style="text-align: left;">cell 1.1</td>
+<td style="text-align: center;">cell 1.2</td>
+<td style="text-align: right;">cell 1.3</td>
+</tr>
+<tr>
+<td style="text-align: left;">cell 2.1</td>
+<td style="text-align: center;">cell 2.2</td>
+<td style="text-align: right;">cell 2.3</td>
+</tr>
+</tbody>
+</table>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aligned_table.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aligned_table.md
new file mode 100644
index 0000000000..69a45f90fe
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/aligned_table.md
@@ -0,0 +1,4 @@
+| header 1 | header 2 | header 2 |
+| :------- | :------: | -------: |
+| cell 1.1 | cell 1.2 | cell 1.3 |
+| cell 2.1 | cell 2.2 | cell 2.3 |
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/atx_heading.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/atx_heading.html
new file mode 100644
index 0000000000..751f8739f8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/atx_heading.html
@@ -0,0 +1,9 @@
+<h1>h1</h1>
+<h2>h2</h2>
+<h3>h3</h3>
+<h4>h4</h4>
+<h5>h5</h5>
+<h6>h6</h6>
+<p>####### not a heading</p>
+<h1>closed h1</h1>
+<p>#</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/atx_heading.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/atx_heading.md
new file mode 100644
index 0000000000..ad97b44ca1
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/atx_heading.md
@@ -0,0 +1,17 @@
+# h1
+
+## h2
+
+### h3
+
+#### h4
+
+##### h5
+
+###### h6
+
+####### not a heading
+
+# closed h1 #
+
+#
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/automatic_link.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/automatic_link.html
new file mode 100644
index 0000000000..50a94ba0fb
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/automatic_link.html
@@ -0,0 +1 @@
+<p><a href="http://example.com">http://example.com</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/automatic_link.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/automatic_link.md
new file mode 100644
index 0000000000..08d3bf46a8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/automatic_link.md
@@ -0,0 +1 @@
+<http://example.com>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/block-level_html.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/block-level_html.html
new file mode 100644
index 0000000000..6443a4a6a5
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/block-level_html.html
@@ -0,0 +1,12 @@
+<div>_content_</div>
+<p>paragraph</p>
+<div>
+  <div class="inner">
+    _content_
+  </div>
+</div>
+<style type="text/css">
+  p {color: #789;}
+</style>
+<div>
+  <a href="/">home</a></div>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/block-level_html.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/block-level_html.md
new file mode 100644
index 0000000000..17cbc22d31
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/block-level_html.md
@@ -0,0 +1,16 @@
+<div>_content_</div>
+
+paragraph
+
+<div>
+  <div class="inner">
+    _content_
+  </div>
+</div>
+
+<style type="text/css">
+  p {color: #789;}
+</style>
+
+<div>
+  <a href="/">home</a></div>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_block.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_block.html
new file mode 100644
index 0000000000..889b02d993
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_block.html
@@ -0,0 +1,8 @@
+<pre><code>&lt;?php
+
+$message = 'Hello World!';
+echo $message;</code></pre>
+<hr />
+<pre><code>&gt; not a quote
+- not a list item
+[not a reference]: http://foo.com</code></pre>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_block.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_block.md
new file mode 100644
index 0000000000..2cfc953cc6
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_block.md
@@ -0,0 +1,10 @@
+    <?php
+
+    $message = 'Hello World!';
+    echo $message;
+
+---
+
+    > not a quote
+    - not a list item
+    [not a reference]: http://foo.com
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_span.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_span.html
new file mode 100644
index 0000000000..5c4c231e38
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_span.html
@@ -0,0 +1,6 @@
+<p>a <code>code span</code></p>
+<p><code>this is also a codespan</code> trailing text</p>
+<p><code>and look at this one!</code></p>
+<p>single backtick in a code span: <code>`</code></p>
+<p>backtick-delimited string in a code span: <code>`foo`</code></p>
+<p><code>sth `` sth</code></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_span.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_span.md
new file mode 100644
index 0000000000..c2f1a74420
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/code_span.md
@@ -0,0 +1,11 @@
+a `code span`
+
+`this is also a codespan` trailing text
+
+`and look at this one!`
+
+single backtick in a code span: `` ` ``
+
+backtick-delimited string in a code span: `` `foo` ``
+
+`sth `` sth`
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_blockquote.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_blockquote.html
new file mode 100644
index 0000000000..37afb57a48
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_blockquote.html
@@ -0,0 +1,9 @@
+<blockquote>
+<h2>header</h2>
+<p>paragraph</p>
+<ul>
+<li>li</li>
+</ul>
+<hr />
+<p>paragraph</p>
+</blockquote>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_blockquote.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_blockquote.md
new file mode 100644
index 0000000000..80c4aed16c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_blockquote.md
@@ -0,0 +1,10 @@
+> header
+> ------
+>
+> paragraph
+>
+> - li
+>
+> ---
+>
+> paragraph
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_emphasis.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_emphasis.html
new file mode 100644
index 0000000000..178dd54bae
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_emphasis.html
@@ -0,0 +1,2 @@
+<p><em><code>code</code></em> <strong><code>code</code></strong></p>
+<p><em><code>code</code><strong><code>code</code></strong><code>code</code></em></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_emphasis.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_emphasis.md
new file mode 100644
index 0000000000..6fe07f2600
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_emphasis.md
@@ -0,0 +1,4 @@
+_`code`_ __`code`__
+
+*`code`**`code`**`code`*
+
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_list.html
new file mode 100644
index 0000000000..f5593c1420
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_list.html
@@ -0,0 +1,12 @@
+<ul>
+<li>
+<p>paragraph</p>
+<p>paragraph</p>
+</li>
+<li>
+<p>paragraph</p>
+<blockquote>
+<p>quote</p>
+</blockquote>
+</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_list.md
new file mode 100644
index 0000000000..ed7f0c60f3
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/compound_list.md
@@ -0,0 +1,7 @@
+- paragraph
+
+  paragraph
+
+- paragraph
+
+  > quote
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/deeply_nested_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/deeply_nested_list.html
new file mode 100644
index 0000000000..d2c7e5acc8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/deeply_nested_list.html
@@ -0,0 +1,12 @@
+<ul>
+<li>li
+<ul>
+<li>li
+<ul>
+<li>li</li>
+<li>li</li>
+</ul></li>
+<li>li</li>
+</ul></li>
+<li>li</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/deeply_nested_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/deeply_nested_list.md
new file mode 100644
index 0000000000..76b7552d85
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/deeply_nested_list.md
@@ -0,0 +1,6 @@
+- li
+    - li
+        - li
+        - li
+    - li
+- li
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/em_strong.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/em_strong.html
new file mode 100644
index 0000000000..323d60aec7
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/em_strong.html
@@ -0,0 +1,8 @@
+<p><strong><em>em strong</em></strong></p>
+<p><strong><em>em strong</em> strong</strong></p>
+<p><strong>strong <em>em strong</em></strong></p>
+<p><strong>strong <em>em strong</em> strong</strong></p>
+<p><strong><em>em strong</em></strong></p>
+<p><strong><em>em strong</em> strong</strong></p>
+<p><strong>strong <em>em strong</em></strong></p>
+<p><strong>strong <em>em strong</em> strong</strong></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/em_strong.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/em_strong.md
new file mode 100644
index 0000000000..9abeb3fd4a
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/em_strong.md
@@ -0,0 +1,15 @@
+___em strong___
+
+___em strong_ strong__
+
+__strong _em strong___
+
+__strong _em strong_ strong__
+
+***em strong***
+
+***em strong* strong**
+
+**strong *em strong***
+
+**strong *em strong* strong**
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/email.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/email.html
new file mode 100644
index 0000000000..c40759c969
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/email.html
@@ -0,0 +1 @@
+<p>my email is <a href="mailto:me@example.com">me@example.com</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/email.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/email.md
new file mode 100644
index 0000000000..26b7b6cc56
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/email.md
@@ -0,0 +1 @@
+my email is <me@example.com>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/emphasis.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/emphasis.html
new file mode 100644
index 0000000000..60ff4bd8b3
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/emphasis.html
@@ -0,0 +1,8 @@
+<p><em>underscore</em>, <em>asterisk</em>, <em>one two</em>, <em>three four</em>, <em>a</em>, <em>b</em></p>
+<p><strong>strong</strong> and <em>em</em> and <strong>strong</strong> and <em>em</em></p>
+<p><em>line
+line
+line</em></p>
+<p>this_is_not_an_emphasis</p>
+<p>an empty emphasis __ ** is not an emphasis</p>
+<p>*mixed *<em>double and</em> single asterisk** spans</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/emphasis.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/emphasis.md
new file mode 100644
index 0000000000..85b9d2299f
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/emphasis.md
@@ -0,0 +1,13 @@
+_underscore_, *asterisk*, _one two_, *three four*, _a_, *b*
+
+**strong** and *em* and **strong** and *em*
+
+_line
+line
+line_
+
+this_is_not_an_emphasis
+
+an empty emphasis __ ** is not an emphasis
+
+*mixed **double and* single asterisk** spans
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/escaping.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/escaping.html
new file mode 100644
index 0000000000..ab1c41fdc1
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/escaping.html
@@ -0,0 +1,6 @@
+<p>escaped *emphasis*.</p>
+<p><code>escaped \*emphasis\* in a code span</code></p>
+<pre><code>escaped \*emphasis\* in a code block</code></pre>
+<p>\ ` * _ { } [ ] ( ) > # + - . !</p>
+<p><em>one_two</em> <strong>one_two</strong></p>
+<p><em>one*two</em> <strong>one*two</strong></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/escaping.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/escaping.md
new file mode 100644
index 0000000000..9f174e98c2
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/escaping.md
@@ -0,0 +1,11 @@
+escaped \*emphasis\*.
+
+`escaped \*emphasis\* in a code span`
+
+    escaped \*emphasis\* in a code block
+
+\\ \` \* \_ \{ \} \[ \] \( \) \> \# \+ \- \. \!
+
+_one\_two_ __one\_two__
+
+*one\*two* **one\*two**
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/fenced_code_block.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/fenced_code_block.html
new file mode 100644
index 0000000000..8bdabba962
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/fenced_code_block.html
@@ -0,0 +1,6 @@
+<pre><code>&lt;?php
+
+$message = 'fenced code block';
+echo $message;</code></pre>
+<pre><code>tilde</code></pre>
+<pre><code class="language-php">echo 'language identifier';</code></pre>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/fenced_code_block.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/fenced_code_block.md
new file mode 100644
index 0000000000..cbed8ebb56
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/fenced_code_block.md
@@ -0,0 +1,14 @@
+```
+<?php
+
+$message = 'fenced code block';
+echo $message;
+```
+
+~~~
+tilde
+~~~
+
+```php
+echo 'language identifier';
+```
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/horizontal_rule.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/horizontal_rule.html
new file mode 100644
index 0000000000..68da03d062
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/horizontal_rule.html
@@ -0,0 +1,5 @@
+<hr />
+<hr />
+<hr />
+<hr />
+<hr />
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/horizontal_rule.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/horizontal_rule.md
new file mode 100644
index 0000000000..bf461a925e
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/horizontal_rule.md
@@ -0,0 +1,9 @@
+---
+
+- - -
+
+   - - -
+
+***
+
+___
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_comment.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_comment.html
new file mode 100644
index 0000000000..566dc3add5
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_comment.html
@@ -0,0 +1,5 @@
+<!-- single line -->
+<p>paragraph</p>
+<!-- 
+  multiline -->
+<p>paragraph</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_comment.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_comment.md
new file mode 100644
index 0000000000..6ddfdb441e
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_comment.md
@@ -0,0 +1,8 @@
+<!-- single line -->
+
+paragraph
+
+<!-- 
+  multiline -->
+
+paragraph
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_entity.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_entity.html
new file mode 100644
index 0000000000..4d23e3cd4b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_entity.html
@@ -0,0 +1 @@
+<p>&amp; &copy; &#123;</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_entity.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_entity.md
new file mode 100644
index 0000000000..ff545ea5ca
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/html_entity.md
@@ -0,0 +1 @@
+&amp; &copy; &#123;
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_reference.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_reference.html
new file mode 100644
index 0000000000..67fbd2c864
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_reference.html
@@ -0,0 +1,2 @@
+<p><img src="/md.png" alt="Markdown Logo" /></p>
+<p>![missing reference]</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_reference.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_reference.md
new file mode 100644
index 0000000000..1e11d9479e
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_reference.md
@@ -0,0 +1,5 @@
+![Markdown Logo][image]
+
+[image]: /md.png
+
+![missing reference]
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_title.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_title.html
new file mode 100644
index 0000000000..957c9505cf
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_title.html
@@ -0,0 +1,2 @@
+<p><img src="/md.png" alt="alt" title="title" /></p>
+<p><img src="/md.png" alt="blank title" title="" /></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_title.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_title.md
new file mode 100644
index 0000000000..7ce2849a51
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/image_title.md
@@ -0,0 +1,3 @@
+![alt](/md.png "title")
+
+![blank title](/md.png "")
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/implicit_reference.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/implicit_reference.html
new file mode 100644
index 0000000000..24b51c1b00
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/implicit_reference.html
@@ -0,0 +1,4 @@
+<p>an <a href="http://example.com">implicit</a> reference link</p>
+<p>an <a href="http://example.com">implicit</a> reference link with an empty link definition</p>
+<p>an <a href="http://example.com">implicit</a> reference link followed by <a href="http://cnn.com">another</a></p>
+<p>an <a href="http://example.com" title="Example">explicit</a> reference link with a title</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/implicit_reference.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/implicit_reference.md
new file mode 100644
index 0000000000..f850df964c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/implicit_reference.md
@@ -0,0 +1,13 @@
+an [implicit] reference link
+
+[implicit]: http://example.com
+
+an [implicit][] reference link with an empty link definition
+
+an [implicit][] reference link followed by [another][]
+
+[another]: http://cnn.com
+
+an [explicit][example] reference link with a title
+
+[example]: http://example.com "Example"
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link.html
new file mode 100644
index 0000000000..5ad564aa3d
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link.html
@@ -0,0 +1,6 @@
+<p><a href="http://example.com">link</a></p>
+<p><a href="/url-(parentheses)">link</a> with parentheses in URL </p>
+<p>(<a href="/index.php">link</a>) in parentheses</p>
+<p><a href="http://example.com"><code>link</code></a></p>
+<p><a href="http://example.com"><img src="http://parsedown.org/md.png" alt="MD Logo" /></a></p>
+<p><a href="http://example.com"><img src="http://parsedown.org/md.png" alt="MD Logo" /> and text</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link.md
new file mode 100644
index 0000000000..6bac0b35e6
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link.md
@@ -0,0 +1,11 @@
+[link](http://example.com)
+
+[link](/url-(parentheses)) with parentheses in URL 
+
+([link](/index.php)) in parentheses
+
+[`link`](http://example.com)
+
+[![MD Logo](http://parsedown.org/md.png)](http://example.com)
+
+[![MD Logo](http://parsedown.org/md.png) and text](http://example.com)
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link_title.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link_title.html
new file mode 100644
index 0000000000..ecdfd03daa
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link_title.html
@@ -0,0 +1,6 @@
+<p><a href="http://example.com" title="Title">single quotes</a></p>
+<p><a href="http://example.com" title="Title">double quotes</a></p>
+<p><a href="http://example.com" title="">single quotes blank</a></p>
+<p><a href="http://example.com" title="">double quotes blank</a></p>
+<p><a href="http://example.com" title="2 Words">space</a></p>
+<p><a href="http://example.com/url-(parentheses)" title="Title">parentheses</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link_title.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link_title.md
new file mode 100644
index 0000000000..6e1c5af9bc
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_link_title.md
@@ -0,0 +1,11 @@
+[single quotes](http://example.com 'Title')
+
+[double quotes](http://example.com "Title")
+
+[single quotes blank](http://example.com '')
+
+[double quotes blank](http://example.com "")
+
+[space](http://example.com "2 Words")
+
+[parentheses](http://example.com/url-(parentheses) "Title")
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_title.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_title.html
new file mode 100644
index 0000000000..bbab93b6c5
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_title.html
@@ -0,0 +1 @@
+<p><a href="http://example.com" title="Example">single quotes</a> and <a href="http://example.com" title="Example">double quotes</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_title.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_title.md
new file mode 100644
index 0000000000..cb09344a1b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/inline_title.md
@@ -0,0 +1 @@
+[single quotes](http://example.com 'Example') and [double quotes](http://example.com "Example")
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_blockquote.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_blockquote.html
new file mode 100644
index 0000000000..0a2a2aaf9a
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_blockquote.html
@@ -0,0 +1,6 @@
+<blockquote>
+<p>quote
+the rest of it</p>
+<p>another paragraph
+the rest of it</p>
+</blockquote>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_blockquote.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_blockquote.md
new file mode 100644
index 0000000000..48f645f947
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_blockquote.md
@@ -0,0 +1,5 @@
+> quote
+the rest of it
+
+> another paragraph
+the rest of it
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_list.html
new file mode 100644
index 0000000000..1a51992495
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_list.html
@@ -0,0 +1,4 @@
+<ul>
+<li>li
+the rest of it</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_list.md
new file mode 100644
index 0000000000..62ad9d719b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/lazy_list.md
@@ -0,0 +1,2 @@
+- li
+the rest of it
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/line_break.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/line_break.html
new file mode 100644
index 0000000000..5f37d854c0
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/line_break.html
@@ -0,0 +1,2 @@
+<p>line<br />
+line</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/line_break.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/line_break.md
new file mode 100644
index 0000000000..04dff43e04
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/line_break.md
@@ -0,0 +1,2 @@
+line  
+line
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/multiline_list_paragraph.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/multiline_list_paragraph.html
new file mode 100644
index 0000000000..3247bd2279
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/multiline_list_paragraph.html
@@ -0,0 +1,7 @@
+<ul>
+<li>
+<p>li</p>
+<p>line
+line</p>
+</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/multiline_list_paragraph.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/multiline_list_paragraph.md
new file mode 100644
index 0000000000..f5b42729fe
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/multiline_list_paragraph.md
@@ -0,0 +1,4 @@
+- li
+
+  line
+  line
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/nested_block-level_html.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/nested_block-level_html.html
new file mode 100644
index 0000000000..bfbef54d76
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/nested_block-level_html.html
@@ -0,0 +1,10 @@
+<div>
+_parent_
+<div>
+_child_
+</div>
+<pre>
+_adopted child_
+</pre>
+</div>
+<p><em>outside</em></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/nested_block-level_html.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/nested_block-level_html.md
new file mode 100644
index 0000000000..5e01e10978
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/nested_block-level_html.md
@@ -0,0 +1,11 @@
+<div>
+_parent_
+<div>
+_child_
+</div>
+<pre>
+_adopted child_
+</pre>
+</div>
+
+_outside_
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/ordered_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/ordered_list.html
new file mode 100644
index 0000000000..b6c5216ca0
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/ordered_list.html
@@ -0,0 +1,13 @@
+<ol>
+<li>one</li>
+<li>two</li>
+</ol>
+<p>repeating numbers:</p>
+<ol>
+<li>one</li>
+<li>two</li>
+</ol>
+<p>large numbers:</p>
+<ol>
+<li>one</li>
+</ol>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/ordered_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/ordered_list.md
new file mode 100644
index 0000000000..b307032cfe
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/ordered_list.md
@@ -0,0 +1,11 @@
+1. one
+2. two
+
+repeating numbers:
+
+1. one
+1. two
+
+large numbers:
+
+123. one
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/paragraph_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/paragraph_list.html
new file mode 100644
index 0000000000..ced1c43ee3
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/paragraph_list.html
@@ -0,0 +1,12 @@
+<p>paragraph</p>
+<ul>
+<li>li</li>
+<li>li</li>
+</ul>
+<p>paragraph</p>
+<ul>
+<li>
+<p>li</p>
+</li>
+<li>li</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/paragraph_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/paragraph_list.md
new file mode 100644
index 0000000000..b973908ced
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/paragraph_list.md
@@ -0,0 +1,9 @@
+paragraph
+- li
+- li
+
+paragraph
+
+   * li
+   
+   * li
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/reference_title.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/reference_title.html
new file mode 100644
index 0000000000..8f2be944c6
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/reference_title.html
@@ -0,0 +1,2 @@
+<p><a href="http://example.com" title="example title">double quotes</a> and <a href="http://example.com" title="example title">single quotes</a> and <a href="http://example.com" title="example title">parentheses</a></p>
+<p>[invalid title]: <a href="http://example.com">http://example.com</a> example title</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/reference_title.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/reference_title.md
new file mode 100644
index 0000000000..43cb21708c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/reference_title.md
@@ -0,0 +1,6 @@
+[double quotes] and [single quotes] and [parentheses]
+
+[double quotes]: http://example.com "example title"
+[single quotes]: http://example.com 'example title'
+[parentheses]: http://example.com (example title)
+[invalid title]: http://example.com example title
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/self-closing_html.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/self-closing_html.html
new file mode 100644
index 0000000000..4d072b43ff
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/self-closing_html.html
@@ -0,0 +1,12 @@
+<hr>
+<p>paragraph</p>
+<hr/>
+<p>paragraph</p>
+<hr />
+<p>paragraph</p>
+<hr class="foo" id="bar" />
+<p>paragraph</p>
+<hr class="foo" id="bar"/>
+<p>paragraph</p>
+<hr class="foo" id="bar" >
+<p>paragraph</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/self-closing_html.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/self-closing_html.md
new file mode 100644
index 0000000000..acb20327d8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/self-closing_html.md
@@ -0,0 +1,12 @@
+<hr>
+paragraph
+<hr/>
+paragraph
+<hr />
+paragraph
+<hr class="foo" id="bar" />
+paragraph
+<hr class="foo" id="bar"/>
+paragraph
+<hr class="foo" id="bar" >
+paragraph
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/separated_nested_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/separated_nested_list.html
new file mode 100644
index 0000000000..80a5cae264
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/separated_nested_list.html
@@ -0,0 +1,9 @@
+<ul>
+<li>
+<p>li</p>
+<ul>
+<li>li</li>
+<li>li</li>
+</ul>
+</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/separated_nested_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/separated_nested_list.md
new file mode 100644
index 0000000000..d7cd1af792
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/separated_nested_list.md
@@ -0,0 +1,4 @@
+- li
+
+    - li
+    - li
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/setext_header.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/setext_header.html
new file mode 100644
index 0000000000..60aac08151
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/setext_header.html
@@ -0,0 +1,5 @@
+<h1>h1</h1>
+<h2>h2</h2>
+<h2>single character</h2>
+<p>not a header</p>
+<hr />
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/setext_header.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/setext_header.md
new file mode 100644
index 0000000000..c43b52c367
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/setext_header.md
@@ -0,0 +1,12 @@
+h1
+==
+
+h2
+--
+
+single character
+-
+
+not a header
+
+------------
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_blockquote.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_blockquote.html
new file mode 100644
index 0000000000..8225d57cc2
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_blockquote.html
@@ -0,0 +1,11 @@
+<blockquote>
+<p>quote</p>
+</blockquote>
+<p>indented:</p>
+<blockquote>
+<p>quote</p>
+</blockquote>
+<p>no space after <code>&gt;</code>:</p>
+<blockquote>
+<p>quote</p>
+</blockquote>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_blockquote.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_blockquote.md
new file mode 100644
index 0000000000..22b6b11a95
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_blockquote.md
@@ -0,0 +1,7 @@
+> quote
+
+indented:
+   > quote
+
+no space after `>`:
+>quote
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_table.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_table.html
new file mode 100644
index 0000000000..237d7efb33
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_table.html
@@ -0,0 +1,37 @@
+<table>
+<thead>
+<tr>
+<th>header 1</th>
+<th>header 2</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>cell 1.1</td>
+<td>cell 1.2</td>
+</tr>
+<tr>
+<td>cell 2.1</td>
+<td>cell 2.2</td>
+</tr>
+</tbody>
+</table>
+<hr />
+<table>
+<thead>
+<tr>
+<th style="text-align: left;">header 1</th>
+<th>header 2</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td style="text-align: left;">cell 1.1</td>
+<td>cell 1.2</td>
+</tr>
+<tr>
+<td style="text-align: left;">cell 2.1</td>
+<td>cell 2.2</td>
+</tr>
+</tbody>
+</table>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_table.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_table.md
new file mode 100644
index 0000000000..466d140e31
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/simple_table.md
@@ -0,0 +1,11 @@
+header 1 | header 2
+-------- | --------
+cell 1.1 | cell 1.2
+cell 2.1 | cell 2.2
+
+---
+
+header 1 | header 2
+:------- | --------
+cell 1.1 | cell 1.2
+cell 2.1 | cell 2.2
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/span-level_html.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/span-level_html.html
new file mode 100644
index 0000000000..f852a25a23
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/span-level_html.html
@@ -0,0 +1,5 @@
+<p>an <b>important</b> <a href=''>link</a></p>
+<p>broken<br/>
+line</p>
+<p><b>inline tag</b> at the beginning</p>
+<p><span><a href="http://example.com">http://example.com</a></span></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/span-level_html.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/span-level_html.md
new file mode 100644
index 0000000000..f221965553
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/span-level_html.md
@@ -0,0 +1,8 @@
+an <b>important</b> <a href=''>link</a>
+
+broken<br/>
+line
+
+<b>inline tag</b> at the beginning
+
+<span>http://example.com</span>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_dense_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_dense_list.html
new file mode 100644
index 0000000000..095bc73969
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_dense_list.html
@@ -0,0 +1,7 @@
+<ul>
+<li>
+<p>li</p>
+</li>
+<li>li</li>
+<li>li</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_dense_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_dense_list.md
new file mode 100644
index 0000000000..576842277d
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_dense_list.md
@@ -0,0 +1,4 @@
+- li
+
+- li
+- li
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_html.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_html.html
new file mode 100644
index 0000000000..9e896274c8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_html.html
@@ -0,0 +1,8 @@
+<div>
+line 1
+
+line 2
+line 3
+
+line 4
+</div>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_html.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_html.md
new file mode 100644
index 0000000000..9e896274c8
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_html.md
@@ -0,0 +1,8 @@
+<div>
+line 1
+
+line 2
+line 3
+
+line 4
+</div>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_list.html
new file mode 100644
index 0000000000..452b2b86dd
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_list.html
@@ -0,0 +1,15 @@
+<ul>
+<li>
+<p>li</p>
+</li>
+<li>li</li>
+</ul>
+<hr />
+<ul>
+<li>
+<p>li</p>
+<ul>
+<li>indented li</li>
+</ul>
+</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_list.md
new file mode 100644
index 0000000000..362a35f57c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/sparse_list.md
@@ -0,0 +1,9 @@
+- li
+
+- li
+
+---
+
+- li
+
+    - indented li
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/special_characters.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/special_characters.html
new file mode 100644
index 0000000000..3b652c338f
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/special_characters.html
@@ -0,0 +1,6 @@
+<p>AT&amp;T has an ampersand in their name</p>
+<p>this &amp; that</p>
+<p>4 &lt; 5 and 6 &gt; 5</p>
+<p><a href="http://example.com/autolink?a=1&amp;b=2">http://example.com/autolink?a=1&amp;b=2</a></p>
+<p><a href="/script?a=1&amp;b=2">inline link</a></p>
+<p><a href="http://example.com/?a=1&amp;b=2">reference link</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/special_characters.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/special_characters.md
new file mode 100644
index 0000000000..111b03b636
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/special_characters.md
@@ -0,0 +1,13 @@
+AT&T has an ampersand in their name
+
+this & that
+
+4 < 5 and 6 > 5
+
+<http://example.com/autolink?a=1&b=2>
+
+[inline link](/script?a=1&b=2)
+
+[reference link][1]
+
+[1]: http://example.com/?a=1&b=2
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strikethrough.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strikethrough.html
new file mode 100644
index 0000000000..2a9da98213
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strikethrough.html
@@ -0,0 +1,3 @@
+<p><del>strikethrough</del></p>
+<p>here's <del>one</del> followed by <del>another one</del></p>
+<p>~~ this ~~ is not one neither is ~this~</p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strikethrough.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strikethrough.md
new file mode 100644
index 0000000000..d169144d29
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strikethrough.md
@@ -0,0 +1,5 @@
+~~strikethrough~~
+
+here's ~~one~~ followed by ~~another one~~
+
+~~ this ~~ is not one neither is ~this~
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strong_em.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strong_em.html
new file mode 100644
index 0000000000..b709c9914b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strong_em.html
@@ -0,0 +1,6 @@
+<p><em>em <strong>strong em</strong></em></p>
+<p><em><strong>strong em</strong> em</em></p>
+<p><em>em <strong>strong em</strong> em</em></p>
+<p><em>em <strong>strong em</strong></em></p>
+<p><em><strong>strong em</strong> em</em></p>
+<p><em>em <strong>strong em</strong> em</em></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strong_em.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strong_em.md
new file mode 100644
index 0000000000..f2aa3c7827
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/strong_em.md
@@ -0,0 +1,11 @@
+*em **strong em***
+
+***strong em** em*
+
+*em **strong em** em*
+
+_em __strong em___
+
+___strong em__ em_
+
+_em __strong em__ em_
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/tab-indented_code_block.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/tab-indented_code_block.html
new file mode 100644
index 0000000000..7c140de730
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/tab-indented_code_block.html
@@ -0,0 +1,6 @@
+<pre><code>&lt;?php
+
+$message = 'Hello World!';
+echo $message;
+
+echo "following a blank line";</code></pre>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/tab-indented_code_block.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/tab-indented_code_block.md
new file mode 100644
index 0000000000..a405a1609a
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/tab-indented_code_block.md
@@ -0,0 +1,6 @@
+	<?php
+	
+	$message = 'Hello World!';
+	echo $message;
+
+	echo "following a blank line";
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/table_inline_markdown.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/table_inline_markdown.html
new file mode 100644
index 0000000000..f4cebecba3
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/table_inline_markdown.html
@@ -0,0 +1,22 @@
+<table>
+<thead>
+<tr>
+<th><em>header</em> 1</th>
+<th>header 2</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><em>cell</em> 1.1</td>
+<td><del>cell</del> 1.2</td>
+</tr>
+<tr>
+<td><code>|</code> 2.1</td>
+<td>| 2.2</td>
+</tr>
+<tr>
+<td><code>\|</code> 2.1</td>
+<td><a href="/">link</a></td>
+</tr>
+</tbody>
+</table>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/table_inline_markdown.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/table_inline_markdown.md
new file mode 100644
index 0000000000..2f3c6200f2
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/table_inline_markdown.md
@@ -0,0 +1,5 @@
+| _header_ 1   | header 2     |
+| ------------ | ------------ |
+| _cell_ 1.1   | ~~cell~~ 1.2 |
+| `|` 2.1      | \| 2.2       |
+| `\|` 2.1     | [link](/)    |
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/text_reference.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/text_reference.html
new file mode 100644
index 0000000000..11e4d37ffa
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/text_reference.html
@@ -0,0 +1,8 @@
+<p><a href="http://example.com">reference link</a></p>
+<p><a href="http://example.com">one</a> with a semantic name</p>
+<p>[one][404] with no definition</p>
+<p><a href="http://example.com">multiline
+one</a> defined on 2 lines</p>
+<p><a href="http://example.com">one</a> with a mixed case label and an upper case definition</p>
+<p><a href="http://example.com">one</a> with the a label on the next line</p>
+<p><a href="http://example.com"><code>link</code></a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/text_reference.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/text_reference.md
new file mode 100644
index 0000000000..1a66a5cf6b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/text_reference.md
@@ -0,0 +1,21 @@
+[reference link][1]
+
+[1]: http://example.com
+
+[one][website] with a semantic name
+
+[website]: http://example.com
+
+[one][404] with no definition
+
+[multiline
+one][website] defined on 2 lines
+
+[one][Label] with a mixed case label and an upper case definition
+
+[LABEL]: http://example.com
+
+[one]
+[1] with the a label on the next line
+
+[`link`][website]
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/unordered_list.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/unordered_list.html
new file mode 100644
index 0000000000..cd95567b7b
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/unordered_list.html
@@ -0,0 +1,10 @@
+<ul>
+<li>li</li>
+<li>li</li>
+</ul>
+<p>mixed markers:</p>
+<ul>
+<li>li</li>
+<li>li</li>
+<li>li</li>
+</ul>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/unordered_list.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/unordered_list.md
new file mode 100644
index 0000000000..cf62c99f21
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/unordered_list.md
@@ -0,0 +1,8 @@
+- li
+- li
+
+mixed markers:
+
+* li
++ li
+- li
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/untidy_table.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/untidy_table.html
new file mode 100644
index 0000000000..88e1c2bd44
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/untidy_table.html
@@ -0,0 +1,18 @@
+<table>
+<thead>
+<tr>
+<th>header 1</th>
+<th>header 2</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>cell 1.1</td>
+<td>cell 1.2</td>
+</tr>
+<tr>
+<td>cell 2.1</td>
+<td>cell 2.2</td>
+</tr>
+</tbody>
+</table>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/untidy_table.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/untidy_table.md
new file mode 100644
index 0000000000..8524eb1847
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/untidy_table.md
@@ -0,0 +1,4 @@
+| header 1 | header 2          |
+| ------------- | ----------- |
+| cell 1.1   | cell 1.2 |
+|    cell 2.1 | cell 2.2     |
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/url_autolinking.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/url_autolinking.html
new file mode 100644
index 0000000000..58ca94c6bd
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/url_autolinking.html
@@ -0,0 +1,3 @@
+<p>an autolink <a href="http://example.com">http://example.com</a></p>
+<p>inside of brackets [<a href="http://example.com">http://example.com</a>], inside of braces {<a href="http://example.com">http://example.com</a>},  inside of parentheses (<a href="http://example.com">http://example.com</a>)</p>
+<p>trailing slash <a href="http://example.com/">http://example.com/</a> and <a href="http://example.com/path/">http://example.com/path/</a></p>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/url_autolinking.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/url_autolinking.md
new file mode 100644
index 0000000000..840f354042
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/url_autolinking.md
@@ -0,0 +1,5 @@
+an autolink http://example.com
+
+inside of brackets [http://example.com], inside of braces {http://example.com},  inside of parentheses (http://example.com)
+
+trailing slash http://example.com/ and http://example.com/path/
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/whitespace.html b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/whitespace.html
new file mode 100644
index 0000000000..f2dd7a0020
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/whitespace.html
@@ -0,0 +1 @@
+<pre><code>code</code></pre>
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/whitespace.md b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/whitespace.md
new file mode 100644
index 0000000000..4cf926a8ad
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/api/erusev/parsedown/test/data/whitespace.md
@@ -0,0 +1,5 @@
+    
+
+    code
+
+    
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/parsedown/LICENSE.txt b/wcfsetup/install/files/lib/system/api/parsedown/LICENSE.txt
deleted file mode 100644
index baca86f5b8..0000000000
--- a/wcfsetup/install/files/lib/system/api/parsedown/LICENSE.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2013 Emanuil Rusev, erusev.com
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/wcfsetup/install/files/lib/system/api/parsedown/Parsedown.php b/wcfsetup/install/files/lib/system/api/parsedown/Parsedown.php
deleted file mode 100644
index c5a8123331..0000000000
--- a/wcfsetup/install/files/lib/system/api/parsedown/Parsedown.php
+++ /dev/null
@@ -1,1528 +0,0 @@
-<?php
-
-#
-#
-# Parsedown
-# http://parsedown.org
-#
-# (c) Emanuil Rusev
-# http://erusev.com
-#
-# For the full license information, view the LICENSE file that was distributed
-# with this source code.
-#
-#
-
-class Parsedown
-{
-    # ~
-
-    const version = '1.5.1';
-
-    # ~
-
-    function text($text)
-    {
-        # make sure no definitions are set
-        $this->DefinitionData = array();
-
-        # standardize line breaks
-        $text = str_replace(array("\r\n", "\r"), "\n", $text);
-
-        # remove surrounding line breaks
-        $text = trim($text, "\n");
-
-        # split text into lines
-        $lines = explode("\n", $text);
-
-        # iterate through lines to identify blocks
-        $markup = $this->lines($lines);
-
-        # trim line breaks
-        $markup = trim($markup, "\n");
-
-        return $markup;
-    }
-
-    #
-    # Setters
-    #
-
-    function setBreaksEnabled($breaksEnabled)
-    {
-        $this->breaksEnabled = $breaksEnabled;
-
-        return $this;
-    }
-
-    protected $breaksEnabled;
-
-    function setMarkupEscaped($markupEscaped)
-    {
-        $this->markupEscaped = $markupEscaped;
-
-        return $this;
-    }
-
-    protected $markupEscaped;
-
-    function setUrlsLinked($urlsLinked)
-    {
-        $this->urlsLinked = $urlsLinked;
-
-        return $this;
-    }
-
-    protected $urlsLinked = true;
-
-    #
-    # Lines
-    #
-
-    protected $BlockTypes = array(
-        '#' => array('Header'),
-        '*' => array('Rule', 'List'),
-        '+' => array('List'),
-        '-' => array('SetextHeader', 'Table', 'Rule', 'List'),
-        '0' => array('List'),
-        '1' => array('List'),
-        '2' => array('List'),
-        '3' => array('List'),
-        '4' => array('List'),
-        '5' => array('List'),
-        '6' => array('List'),
-        '7' => array('List'),
-        '8' => array('List'),
-        '9' => array('List'),
-        ':' => array('Table'),
-        '<' => array('Comment', 'Markup'),
-        '=' => array('SetextHeader'),
-        '>' => array('Quote'),
-        '[' => array('Reference'),
-        '_' => array('Rule'),
-        '`' => array('FencedCode'),
-        '|' => array('Table'),
-        '~' => array('FencedCode'),
-    );
-
-    # ~
-
-    protected $DefinitionTypes = array(
-        '[' => array('Reference'),
-    );
-
-    # ~
-
-    protected $unmarkedBlockTypes = array(
-        'Code',
-    );
-
-    #
-    # Blocks
-    #
-
-    private function lines(array $lines)
-    {
-        $CurrentBlock = null;
-
-        foreach ($lines as $line)
-        {
-            if (chop($line) === '')
-            {
-                if (isset($CurrentBlock))
-                {
-                    $CurrentBlock['interrupted'] = true;
-                }
-
-                continue;
-            }
-
-            if (strpos($line, "\t") !== false)
-            {
-                $parts = explode("\t", $line);
-
-                $line = $parts[0];
-
-                unset($parts[0]);
-
-                foreach ($parts as $part)
-                {
-                    $shortage = 4 - mb_strlen($line, 'utf-8') % 4;
-
-                    $line .= str_repeat(' ', $shortage);
-                    $line .= $part;
-                }
-            }
-
-            $indent = 0;
-
-            while (isset($line[$indent]) and $line[$indent] === ' ')
-            {
-                $indent ++;
-            }
-
-            $text = $indent > 0 ? substr($line, $indent) : $line;
-
-            # ~
-
-            $Line = array('body' => $line, 'indent' => $indent, 'text' => $text);
-
-            # ~
-
-            if (isset($CurrentBlock['incomplete']))
-            {
-                $Block = $this->{'block'.$CurrentBlock['type'].'Continue'}($Line, $CurrentBlock);
-
-                if (isset($Block))
-                {
-                    $CurrentBlock = $Block;
-
-                    continue;
-                }
-                else
-                {
-                    if (method_exists($this, 'block'.$CurrentBlock['type'].'Complete'))
-                    {
-                        $CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
-                    }
-
-                    unset($CurrentBlock['incomplete']);
-                }
-            }
-
-            # ~
-
-            $marker = $text[0];
-
-            # ~
-
-            $blockTypes = $this->unmarkedBlockTypes;
-
-            if (isset($this->BlockTypes[$marker]))
-            {
-                foreach ($this->BlockTypes[$marker] as $blockType)
-                {
-                    $blockTypes []= $blockType;
-                }
-            }
-
-            #
-            # ~
-
-            foreach ($blockTypes as $blockType)
-            {
-                $Block = $this->{'block'.$blockType}($Line, $CurrentBlock);
-
-                if (isset($Block))
-                {
-                    $Block['type'] = $blockType;
-
-                    if ( ! isset($Block['identified']))
-                    {
-                        $Blocks []= $CurrentBlock;
-
-                        $Block['identified'] = true;
-                    }
-
-                    if (method_exists($this, 'block'.$blockType.'Continue'))
-                    {
-                        $Block['incomplete'] = true;
-                    }
-
-                    $CurrentBlock = $Block;
-
-                    continue 2;
-                }
-            }
-
-            # ~
-
-            if (isset($CurrentBlock) and ! isset($CurrentBlock['type']) and ! isset($CurrentBlock['interrupted']))
-            {
-                $CurrentBlock['element']['text'] .= "\n".$text;
-            }
-            else
-            {
-                $Blocks []= $CurrentBlock;
-
-                $CurrentBlock = $this->paragraph($Line);
-
-                $CurrentBlock['identified'] = true;
-            }
-        }
-
-        # ~
-
-        if (isset($CurrentBlock['incomplete']) and method_exists($this, 'block'.$CurrentBlock['type'].'Complete'))
-        {
-            $CurrentBlock = $this->{'block'.$CurrentBlock['type'].'Complete'}($CurrentBlock);
-        }
-
-        # ~
-
-        $Blocks []= $CurrentBlock;
-
-        unset($Blocks[0]);
-
-        # ~
-
-        $markup = '';
-
-        foreach ($Blocks as $Block)
-        {
-            if (isset($Block['hidden']))
-            {
-                continue;
-            }
-
-            $markup .= "\n";
-            $markup .= isset($Block['markup']) ? $Block['markup'] : $this->element($Block['element']);
-        }
-
-        $markup .= "\n";
-
-        # ~
-
-        return $markup;
-    }
-
-    #
-    # Code
-
-    protected function blockCode($Line, $Block = null)
-    {
-        if (isset($Block) and ! isset($Block['type']) and ! isset($Block['interrupted']))
-        {
-            return;
-        }
-
-        if ($Line['indent'] >= 4)
-        {
-            $text = substr($Line['body'], 4);
-
-            $Block = array(
-                'element' => array(
-                    'name' => 'pre',
-                    'handler' => 'element',
-                    'text' => array(
-                        'name' => 'code',
-                        'text' => $text,
-                    ),
-                ),
-            );
-
-            return $Block;
-        }
-    }
-
-    protected function blockCodeContinue($Line, $Block)
-    {
-        if ($Line['indent'] >= 4)
-        {
-            if (isset($Block['interrupted']))
-            {
-                $Block['element']['text']['text'] .= "\n";
-
-                unset($Block['interrupted']);
-            }
-
-            $Block['element']['text']['text'] .= "\n";
-
-            $text = substr($Line['body'], 4);
-
-            $Block['element']['text']['text'] .= $text;
-
-            return $Block;
-        }
-    }
-
-    protected function blockCodeComplete($Block)
-    {
-        $text = $Block['element']['text']['text'];
-
-        $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
-
-        $Block['element']['text']['text'] = $text;
-
-        return $Block;
-    }
-
-    #
-    # Comment
-
-    protected function blockComment($Line)
-    {
-        if ($this->markupEscaped)
-        {
-            return;
-        }
-
-        if (isset($Line['text'][3]) and $Line['text'][3] === '-' and $Line['text'][2] === '-' and $Line['text'][1] === '!')
-        {
-            $Block = array(
-                'markup' => $Line['body'],
-            );
-
-            if (preg_match('/-->$/', $Line['text']))
-            {
-                $Block['closed'] = true;
-            }
-
-            return $Block;
-        }
-    }
-
-    protected function blockCommentContinue($Line, array $Block)
-    {
-        if (isset($Block['closed']))
-        {
-            return;
-        }
-
-        $Block['markup'] .= "\n" . $Line['body'];
-
-        if (preg_match('/-->$/', $Line['text']))
-        {
-            $Block['closed'] = true;
-        }
-
-        return $Block;
-    }
-
-    #
-    # Fenced Code
-
-    protected function blockFencedCode($Line)
-    {
-        if (preg_match('/^(['.$Line['text'][0].']{3,})[ ]*([\w-]+)?[ ]*$/', $Line['text'], $matches))
-        {
-            $Element = array(
-                'name' => 'code',
-                'text' => '',
-            );
-
-            if (isset($matches[2]))
-            {
-                $class = 'language-'.$matches[2];
-
-                $Element['attributes'] = array(
-                    'class' => $class,
-                );
-            }
-
-            $Block = array(
-                'char' => $Line['text'][0],
-                'element' => array(
-                    'name' => 'pre',
-                    'handler' => 'element',
-                    'text' => $Element,
-                ),
-            );
-
-            return $Block;
-        }
-    }
-
-    protected function blockFencedCodeContinue($Line, $Block)
-    {
-        if (isset($Block['complete']))
-        {
-            return;
-        }
-
-        if (isset($Block['interrupted']))
-        {
-            $Block['element']['text']['text'] .= "\n";
-
-            unset($Block['interrupted']);
-        }
-
-        if (preg_match('/^'.$Block['char'].'{3,}[ ]*$/', $Line['text']))
-        {
-            $Block['element']['text']['text'] = substr($Block['element']['text']['text'], 1);
-
-            $Block['complete'] = true;
-
-            return $Block;
-        }
-
-        $Block['element']['text']['text'] .= "\n".$Line['body'];;
-
-        return $Block;
-    }
-
-    protected function blockFencedCodeComplete($Block)
-    {
-        $text = $Block['element']['text']['text'];
-
-        $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
-
-        $Block['element']['text']['text'] = $text;
-
-        return $Block;
-    }
-
-    #
-    # Header
-
-    protected function blockHeader($Line)
-    {
-        if (isset($Line['text'][1]))
-        {
-            $level = 1;
-
-            while (isset($Line['text'][$level]) and $Line['text'][$level] === '#')
-            {
-                $level ++;
-            }
-
-            if ($level > 6)
-            {
-                return;
-            }
-
-            $text = trim($Line['text'], '# ');
-
-            $Block = array(
-                'element' => array(
-                    'name' => 'h' . min(6, $level),
-                    'text' => $text,
-                    'handler' => 'line',
-                ),
-            );
-
-            return $Block;
-        }
-    }
-
-    #
-    # List
-
-    protected function blockList($Line)
-    {
-        list($name, $pattern) = $Line['text'][0] <= '-' ? array('ul', '[*+-]') : array('ol', '[0-9]+[.]');
-
-        if (preg_match('/^('.$pattern.'[ ]+)(.*)/', $Line['text'], $matches))
-        {
-            $Block = array(
-                'indent' => $Line['indent'],
-                'pattern' => $pattern,
-                'element' => array(
-                    'name' => $name,
-                    'handler' => 'elements',
-                ),
-            );
-
-            $Block['li'] = array(
-                'name' => 'li',
-                'handler' => 'li',
-                'text' => array(
-                    $matches[2],
-                ),
-            );
-
-            $Block['element']['text'] []= & $Block['li'];
-
-            return $Block;
-        }
-    }
-
-    protected function blockListContinue($Line, array $Block)
-    {
-        if ($Block['indent'] === $Line['indent'] and preg_match('/^'.$Block['pattern'].'(?:[ ]+(.*)|$)/', $Line['text'], $matches))
-        {
-            if (isset($Block['interrupted']))
-            {
-                $Block['li']['text'] []= '';
-
-                unset($Block['interrupted']);
-            }
-
-            unset($Block['li']);
-
-            $text = isset($matches[1]) ? $matches[1] : '';
-
-            $Block['li'] = array(
-                'name' => 'li',
-                'handler' => 'li',
-                'text' => array(
-                    $text,
-                ),
-            );
-
-            $Block['element']['text'] []= & $Block['li'];
-
-            return $Block;
-        }
-
-        if ($Line['text'][0] === '[' and $this->blockReference($Line))
-        {
-            return $Block;
-        }
-
-        if ( ! isset($Block['interrupted']))
-        {
-            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
-
-            $Block['li']['text'] []= $text;
-
-            return $Block;
-        }
-
-        if ($Line['indent'] > 0)
-        {
-            $Block['li']['text'] []= '';
-
-            $text = preg_replace('/^[ ]{0,4}/', '', $Line['body']);
-
-            $Block['li']['text'] []= $text;
-
-            unset($Block['interrupted']);
-
-            return $Block;
-        }
-    }
-
-    #
-    # Quote
-
-    protected function blockQuote($Line)
-    {
-        if (preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
-        {
-            $Block = array(
-                'element' => array(
-                    'name' => 'blockquote',
-                    'handler' => 'lines',
-                    'text' => (array) $matches[1],
-                ),
-            );
-
-            return $Block;
-        }
-    }
-
-    protected function blockQuoteContinue($Line, array $Block)
-    {
-        if ($Line['text'][0] === '>' and preg_match('/^>[ ]?(.*)/', $Line['text'], $matches))
-        {
-            if (isset($Block['interrupted']))
-            {
-                $Block['element']['text'] []= '';
-
-                unset($Block['interrupted']);
-            }
-
-            $Block['element']['text'] []= $matches[1];
-
-            return $Block;
-        }
-
-        if ( ! isset($Block['interrupted']))
-        {
-            $Block['element']['text'] []= $Line['text'];
-
-            return $Block;
-        }
-    }
-
-    #
-    # Rule
-
-    protected function blockRule($Line)
-    {
-        if (preg_match('/^(['.$Line['text'][0].'])([ ]*\1){2,}[ ]*$/', $Line['text']))
-        {
-            $Block = array(
-                'element' => array(
-                    'name' => 'hr'
-                ),
-            );
-
-            return $Block;
-        }
-    }
-
-    #
-    # Setext
-
-    protected function blockSetextHeader($Line, array $Block = null)
-    {
-        if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
-        {
-            return;
-        }
-
-        if (chop($Line['text'], $Line['text'][0]) === '')
-        {
-            $Block['element']['name'] = $Line['text'][0] === '=' ? 'h1' : 'h2';
-
-            return $Block;
-        }
-    }
-
-    #
-    # Markup
-
-    protected function blockMarkup($Line)
-    {
-        if ($this->markupEscaped)
-        {
-            return;
-        }
-
-        if (preg_match('/^<(\w*)(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*(\/)?>/', $Line['text'], $matches))
-        {
-            if (in_array($matches[1], $this->textLevelElements))
-            {
-                return;
-            }
-
-            $Block = array(
-                'name' => $matches[1],
-                'depth' => 0,
-                'markup' => $Line['text'],
-            );
-
-            $length = strlen($matches[0]);
-
-            $remainder = substr($Line['text'], $length);
-
-            if (trim($remainder) === '')
-            {
-                if (isset($matches[2]) or in_array($matches[1], $this->voidElements))
-                {
-                    $Block['closed'] = true;
-
-                    $Block['void'] = true;
-                }
-            }
-            else
-            {
-                if (isset($matches[2]) or in_array($matches[1], $this->voidElements))
-                {
-                    return;
-                }
-
-                if (preg_match('/<\/'.$matches[1].'>[ ]*$/i', $remainder))
-                {
-                    $Block['closed'] = true;
-                }
-            }
-
-            return $Block;
-        }
-    }
-
-    protected function blockMarkupContinue($Line, array $Block)
-    {
-        if (isset($Block['closed']))
-        {
-            return;
-        }
-
-        if (preg_match('/^<'.$Block['name'].'(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*>/i', $Line['text'])) # open
-        {
-            $Block['depth'] ++;
-        }
-
-        if (preg_match('/(.*?)<\/'.$Block['name'].'>[ ]*$/i', $Line['text'], $matches)) # close
-        {
-            if ($Block['depth'] > 0)
-            {
-                $Block['depth'] --;
-            }
-            else
-            {
-                $Block['closed'] = true;
-            }
-        }
-
-        if (isset($Block['interrupted']))
-        {
-            $Block['markup'] .= "\n";
-
-            unset($Block['interrupted']);
-        }
-
-        $Block['markup'] .= "\n".$Line['body'];
-
-        return $Block;
-    }
-
-    #
-    # Reference
-
-    protected function blockReference($Line)
-    {
-        if (preg_match('/^\[(.+?)\]:[ ]*<?(\S+?)>?(?:[ ]+["\'(](.+)["\')])?[ ]*$/', $Line['text'], $matches))
-        {
-            $id = strtolower($matches[1]);
-
-            $Data = array(
-                'url' => $matches[2],
-                'title' => null,
-            );
-
-            if (isset($matches[3]))
-            {
-                $Data['title'] = $matches[3];
-            }
-
-            $this->DefinitionData['Reference'][$id] = $Data;
-
-            $Block = array(
-                'hidden' => true,
-            );
-
-            return $Block;
-        }
-    }
-
-    #
-    # Table
-
-    protected function blockTable($Line, array $Block = null)
-    {
-        if ( ! isset($Block) or isset($Block['type']) or isset($Block['interrupted']))
-        {
-            return;
-        }
-
-        if (strpos($Block['element']['text'], '|') !== false and chop($Line['text'], ' -:|') === '')
-        {
-            $alignments = array();
-
-            $divider = $Line['text'];
-
-            $divider = trim($divider);
-            $divider = trim($divider, '|');
-
-            $dividerCells = explode('|', $divider);
-
-            foreach ($dividerCells as $dividerCell)
-            {
-                $dividerCell = trim($dividerCell);
-
-                if ($dividerCell === '')
-                {
-                    continue;
-                }
-
-                $alignment = null;
-
-                if ($dividerCell[0] === ':')
-                {
-                    $alignment = 'left';
-                }
-
-                if (substr($dividerCell, - 1) === ':')
-                {
-                    $alignment = $alignment === 'left' ? 'center' : 'right';
-                }
-
-                $alignments []= $alignment;
-            }
-
-            # ~
-
-            $HeaderElements = array();
-
-            $header = $Block['element']['text'];
-
-            $header = trim($header);
-            $header = trim($header, '|');
-
-            $headerCells = explode('|', $header);
-
-            foreach ($headerCells as $index => $headerCell)
-            {
-                $headerCell = trim($headerCell);
-
-                $HeaderElement = array(
-                    'name' => 'th',
-                    'text' => $headerCell,
-                    'handler' => 'line',
-                );
-
-                if (isset($alignments[$index]))
-                {
-                    $alignment = $alignments[$index];
-
-                    $HeaderElement['attributes'] = array(
-                        'style' => 'text-align: '.$alignment.';',
-                    );
-                }
-
-                $HeaderElements []= $HeaderElement;
-            }
-
-            # ~
-
-            $Block = array(
-                'alignments' => $alignments,
-                'identified' => true,
-                'element' => array(
-                    'name' => 'table',
-                    'handler' => 'elements',
-                ),
-            );
-
-            $Block['element']['text'] []= array(
-                'name' => 'thead',
-                'handler' => 'elements',
-            );
-
-            $Block['element']['text'] []= array(
-                'name' => 'tbody',
-                'handler' => 'elements',
-                'text' => array(),
-            );
-
-            $Block['element']['text'][0]['text'] []= array(
-                'name' => 'tr',
-                'handler' => 'elements',
-                'text' => $HeaderElements,
-            );
-
-            return $Block;
-        }
-    }
-
-    protected function blockTableContinue($Line, array $Block)
-    {
-        if (isset($Block['interrupted']))
-        {
-            return;
-        }
-
-        if ($Line['text'][0] === '|' or strpos($Line['text'], '|'))
-        {
-            $Elements = array();
-
-            $row = $Line['text'];
-
-            $row = trim($row);
-            $row = trim($row, '|');
-
-            preg_match_all('/(?:(\\\\[|])|[^|`]|`[^`]+`|`)+/', $row, $matches);
-
-            foreach ($matches[0] as $index => $cell)
-            {
-                $cell = trim($cell);
-
-                $Element = array(
-                    'name' => 'td',
-                    'handler' => 'line',
-                    'text' => $cell,
-                );
-
-                if (isset($Block['alignments'][$index]))
-                {
-                    $Element['attributes'] = array(
-                        'style' => 'text-align: '.$Block['alignments'][$index].';',
-                    );
-                }
-
-                $Elements []= $Element;
-            }
-
-            $Element = array(
-                'name' => 'tr',
-                'handler' => 'elements',
-                'text' => $Elements,
-            );
-
-            $Block['element']['text'][1]['text'] []= $Element;
-
-            return $Block;
-        }
-    }
-
-    #
-    # ~
-    #
-
-    protected function paragraph($Line)
-    {
-        $Block = array(
-            'element' => array(
-                'name' => 'p',
-                'text' => $Line['text'],
-                'handler' => 'line',
-            ),
-        );
-
-        return $Block;
-    }
-
-    #
-    # Inline Elements
-    #
-
-    protected $InlineTypes = array(
-        '"' => array('SpecialCharacter'),
-        '!' => array('Image'),
-        '&' => array('SpecialCharacter'),
-        '*' => array('Emphasis'),
-        ':' => array('Url'),
-        '<' => array('UrlTag', 'EmailTag', 'Markup', 'SpecialCharacter'),
-        '>' => array('SpecialCharacter'),
-        '[' => array('Link'),
-        '_' => array('Emphasis'),
-        '`' => array('Code'),
-        '~' => array('Strikethrough'),
-        '\\' => array('EscapeSequence'),
-    );
-
-    # ~
-
-    protected $inlineMarkerList = '!"*_&[:<>`~\\';
-
-    #
-    # ~
-    #
-
-    public function line($text)
-    {
-        $markup = '';
-
-        $unexaminedText = $text;
-
-        $markerPosition = 0;
-
-        while ($excerpt = strpbrk($unexaminedText, $this->inlineMarkerList))
-        {
-            $marker = $excerpt[0];
-
-            $markerPosition += strpos($unexaminedText, $marker);
-
-            $Excerpt = array('text' => $excerpt, 'context' => $text);
-
-            foreach ($this->InlineTypes[$marker] as $inlineType)
-            {
-                $Inline = $this->{'inline'.$inlineType}($Excerpt);
-
-                if ( ! isset($Inline))
-                {
-                    continue;
-                }
-
-                if (isset($Inline['position']) and $Inline['position'] > $markerPosition) # position is ahead of marker
-                {
-                    continue;
-                }
-
-                if ( ! isset($Inline['position']))
-                {
-                    $Inline['position'] = $markerPosition;
-                }
-
-                $unmarkedText = substr($text, 0, $Inline['position']);
-
-                $markup .= $this->unmarkedText($unmarkedText);
-
-                $markup .= isset($Inline['markup']) ? $Inline['markup'] : $this->element($Inline['element']);
-
-                $text = substr($text, $Inline['position'] + $Inline['extent']);
-
-                $unexaminedText = $text;
-
-                $markerPosition = 0;
-
-                continue 2;
-            }
-
-            $unexaminedText = substr($excerpt, 1);
-
-            $markerPosition ++;
-        }
-
-        $markup .= $this->unmarkedText($text);
-
-        return $markup;
-    }
-
-    #
-    # ~
-    #
-
-    protected function inlineCode($Excerpt)
-    {
-        $marker = $Excerpt['text'][0];
-
-        if (preg_match('/^('.$marker.'+)[ ]*(.+?)[ ]*(?<!'.$marker.')\1(?!'.$marker.')/s', $Excerpt['text'], $matches))
-        {
-            $text = $matches[2];
-            $text = htmlspecialchars($text, ENT_NOQUOTES, 'UTF-8');
-            $text = preg_replace("/[ ]*\n/", ' ', $text);
-
-            return array(
-                'extent' => strlen($matches[0]),
-                'element' => array(
-                    'name' => 'code',
-                    'text' => $text,
-                ),
-            );
-        }
-    }
-
-    protected function inlineEmailTag($Excerpt)
-    {
-        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<((mailto:)?\S+?@\S+?)>/i', $Excerpt['text'], $matches))
-        {
-            $url = $matches[1];
-
-            if ( ! isset($matches[2]))
-            {
-                $url = 'mailto:' . $url;
-            }
-
-            return array(
-                'extent' => strlen($matches[0]),
-                'element' => array(
-                    'name' => 'a',
-                    'text' => $matches[1],
-                    'attributes' => array(
-                        'href' => $url,
-                    ),
-                ),
-            );
-        }
-    }
-
-    protected function inlineEmphasis($Excerpt)
-    {
-        if ( ! isset($Excerpt['text'][1]))
-        {
-            return;
-        }
-
-        $marker = $Excerpt['text'][0];
-
-        if ($Excerpt['text'][1] === $marker and preg_match($this->StrongRegex[$marker], $Excerpt['text'], $matches))
-        {
-            $emphasis = 'strong';
-        }
-        elseif (preg_match($this->EmRegex[$marker], $Excerpt['text'], $matches))
-        {
-            $emphasis = 'em';
-        }
-        else
-        {
-            return;
-        }
-
-        return array(
-            'extent' => strlen($matches[0]),
-            'element' => array(
-                'name' => $emphasis,
-                'handler' => 'line',
-                'text' => $matches[1],
-            ),
-        );
-    }
-
-    protected function inlineEscapeSequence($Excerpt)
-    {
-        if (isset($Excerpt['text'][1]) and in_array($Excerpt['text'][1], $this->specialCharacters))
-        {
-            return array(
-                'markup' => $Excerpt['text'][1],
-                'extent' => 2,
-            );
-        }
-    }
-
-    protected function inlineImage($Excerpt)
-    {
-        if ( ! isset($Excerpt['text'][1]) or $Excerpt['text'][1] !== '[')
-        {
-            return;
-        }
-
-        $Excerpt['text']= substr($Excerpt['text'], 1);
-
-        $Link = $this->inlineLink($Excerpt);
-
-        if ($Link === null)
-        {
-            return;
-        }
-
-        $Inline = array(
-            'extent' => $Link['extent'] + 1,
-            'element' => array(
-                'name' => 'img',
-                'attributes' => array(
-                    'src' => $Link['element']['attributes']['href'],
-                    'alt' => $Link['element']['text'],
-                ),
-            ),
-        );
-
-        $Inline['element']['attributes'] += $Link['element']['attributes'];
-
-        unset($Inline['element']['attributes']['href']);
-
-        return $Inline;
-    }
-
-    protected function inlineLink($Excerpt)
-    {
-        $Element = array(
-            'name' => 'a',
-            'handler' => 'line',
-            'text' => null,
-            'attributes' => array(
-                'href' => null,
-                'title' => null,
-            ),
-        );
-
-        $extent = 0;
-
-        $remainder = $Excerpt['text'];
-
-        if (preg_match('/\[((?:[^][]|(?R))*)\]/', $remainder, $matches))
-        {
-            $Element['text'] = $matches[1];
-
-            $extent += strlen($matches[0]);
-
-            $remainder = substr($remainder, $extent);
-        }
-        else
-        {
-            return;
-        }
-
-        if (preg_match('/^[(]((?:[^ ()]|[(][^ )]+[)])+)(?:[ ]+("[^"]+"|\'[^\']+\'))?[)]/', $remainder, $matches))
-        {
-            $Element['attributes']['href'] = $matches[1];
-
-            if (isset($matches[2]))
-            {
-                $Element['attributes']['title'] = substr($matches[2], 1, - 1);
-            }
-
-            $extent += strlen($matches[0]);
-        }
-        else
-        {
-            if (preg_match('/^\s*\[(.*?)\]/', $remainder, $matches))
-            {
-                $definition = $matches[1] ? $matches[1] : $Element['text'];
-                $definition = strtolower($definition);
-
-                $extent += strlen($matches[0]);
-            }
-            else
-            {
-                $definition = strtolower($Element['text']);
-            }
-
-            if ( ! isset($this->DefinitionData['Reference'][$definition]))
-            {
-                return;
-            }
-
-            $Definition = $this->DefinitionData['Reference'][$definition];
-
-            $Element['attributes']['href'] = $Definition['url'];
-            $Element['attributes']['title'] = $Definition['title'];
-        }
-
-        $Element['attributes']['href'] = str_replace(array('&', '<'), array('&amp;', '&lt;'), $Element['attributes']['href']);
-
-        return array(
-            'extent' => $extent,
-            'element' => $Element,
-        );
-    }
-
-    protected function inlineMarkup($Excerpt)
-    {
-        if ($this->markupEscaped or strpos($Excerpt['text'], '>') === false)
-        {
-            return;
-        }
-
-        if ($Excerpt['text'][1] === '/' and preg_match('/^<\/\w*[ ]*>/s', $Excerpt['text'], $matches))
-        {
-            return array(
-                'markup' => $matches[0],
-                'extent' => strlen($matches[0]),
-            );
-        }
-
-        if ($Excerpt['text'][1] === '!' and preg_match('/^<!---?[^>-](?:-?[^-])*-->/s', $Excerpt['text'], $matches))
-        {
-            return array(
-                'markup' => $matches[0],
-                'extent' => strlen($matches[0]),
-            );
-        }
-
-        if ($Excerpt['text'][1] !== ' ' and preg_match('/^<\w*(?:[ ]*'.$this->regexHtmlAttribute.')*[ ]*\/?>/s', $Excerpt['text'], $matches))
-        {
-            return array(
-                'markup' => $matches[0],
-                'extent' => strlen($matches[0]),
-            );
-        }
-    }
-
-    protected function inlineSpecialCharacter($Excerpt)
-    {
-        if ($Excerpt['text'][0] === '&' and ! preg_match('/^&#?\w+;/', $Excerpt['text']))
-        {
-            return array(
-                'markup' => '&amp;',
-                'extent' => 1,
-            );
-        }
-
-        $SpecialCharacter = array('>' => 'gt', '<' => 'lt', '"' => 'quot');
-
-        if (isset($SpecialCharacter[$Excerpt['text'][0]]))
-        {
-            return array(
-                'markup' => '&'.$SpecialCharacter[$Excerpt['text'][0]].';',
-                'extent' => 1,
-            );
-        }
-    }
-
-    protected function inlineStrikethrough($Excerpt)
-    {
-        if ( ! isset($Excerpt['text'][1]))
-        {
-            return;
-        }
-
-        if ($Excerpt['text'][1] === '~' and preg_match('/^~~(?=\S)(.+?)(?<=\S)~~/', $Excerpt['text'], $matches))
-        {
-            return array(
-                'extent' => strlen($matches[0]),
-                'element' => array(
-                    'name' => 'del',
-                    'text' => $matches[1],
-                    'handler' => 'line',
-                ),
-            );
-        }
-    }
-
-    protected function inlineUrl($Excerpt)
-    {
-        if ($this->urlsLinked !== true or ! isset($Excerpt['text'][2]) or $Excerpt['text'][2] !== '/')
-        {
-            return;
-        }
-
-        if (preg_match('/\bhttps?:[\/]{2}[^\s<]+\b\/*/ui', $Excerpt['context'], $matches, PREG_OFFSET_CAPTURE))
-        {
-            $Inline = array(
-                'extent' => strlen($matches[0][0]),
-                'position' => $matches[0][1],
-                'element' => array(
-                    'name' => 'a',
-                    'text' => $matches[0][0],
-                    'attributes' => array(
-                        'href' => $matches[0][0],
-                    ),
-                ),
-            );
-
-            return $Inline;
-        }
-    }
-
-    protected function inlineUrlTag($Excerpt)
-    {
-        if (strpos($Excerpt['text'], '>') !== false and preg_match('/^<(\w+:\/{2}[^ >]+)>/i', $Excerpt['text'], $matches))
-        {
-            $url = str_replace(array('&', '<'), array('&amp;', '&lt;'), $matches[1]);
-
-            return array(
-                'extent' => strlen($matches[0]),
-                'element' => array(
-                    'name' => 'a',
-                    'text' => $url,
-                    'attributes' => array(
-                        'href' => $url,
-                    ),
-                ),
-            );
-        }
-    }
-
-    # ~
-
-    protected function unmarkedText($text)
-    {
-        if ($this->breaksEnabled)
-        {
-            $text = preg_replace('/[ ]*\n/', "<br />\n", $text);
-        }
-        else
-        {
-            $text = preg_replace('/(?:[ ][ ]+|[ ]*\\\\)\n/', "<br />\n", $text);
-            $text = str_replace(" \n", "\n", $text);
-        }
-
-        return $text;
-    }
-
-    #
-    # Handlers
-    #
-
-    protected function element(array $Element)
-    {
-        $markup = '<'.$Element['name'];
-
-        if (isset($Element['attributes']))
-        {
-            foreach ($Element['attributes'] as $name => $value)
-            {
-                if ($value === null)
-                {
-                    continue;
-                }
-
-                $markup .= ' '.$name.'="'.$value.'"';
-            }
-        }
-
-        if (isset($Element['text']))
-        {
-            $markup .= '>';
-
-            if (isset($Element['handler']))
-            {
-                $markup .= $this->$Element['handler']($Element['text']);
-            }
-            else
-            {
-                $markup .= $Element['text'];
-            }
-
-            $markup .= '</'.$Element['name'].'>';
-        }
-        else
-        {
-            $markup .= ' />';
-        }
-
-        return $markup;
-    }
-
-    protected function elements(array $Elements)
-    {
-        $markup = '';
-
-        foreach ($Elements as $Element)
-        {
-            $markup .= "\n" . $this->element($Element);
-        }
-
-        $markup .= "\n";
-
-        return $markup;
-    }
-
-    # ~
-
-    protected function li($lines)
-    {
-        $markup = $this->lines($lines);
-
-        $trimmedMarkup = trim($markup);
-
-        if ( ! in_array('', $lines) and substr($trimmedMarkup, 0, 3) === '<p>')
-        {
-            $markup = $trimmedMarkup;
-            $markup = substr($markup, 3);
-
-            $position = strpos($markup, "</p>");
-
-            $markup = substr_replace($markup, '', $position, 4);
-        }
-
-        return $markup;
-    }
-
-    #
-    # Deprecated Methods
-    #
-
-    function parse($text)
-    {
-        $markup = $this->text($text);
-
-        return $markup;
-    }
-
-    #
-    # Static Methods
-    #
-
-    static function instance($name = 'default')
-    {
-        if (isset(self::$instances[$name]))
-        {
-            return self::$instances[$name];
-        }
-
-        $instance = new self();
-
-        self::$instances[$name] = $instance;
-
-        return $instance;
-    }
-
-    private static $instances = array();
-
-    #
-    # Fields
-    #
-
-    protected $DefinitionData;
-
-    #
-    # Read-Only
-
-    protected $specialCharacters = array(
-        '\\', '`', '*', '_', '{', '}', '[', ']', '(', ')', '>', '#', '+', '-', '.', '!', '|',
-    );
-
-    protected $StrongRegex = array(
-        '*' => '/^[*]{2}((?:\\\\\*|[^*]|[*][^*]*[*])+?)[*]{2}(?![*])/s',
-        '_' => '/^__((?:\\\\_|[^_]|_[^_]*_)+?)__(?!_)/us',
-    );
-
-    protected $EmRegex = array(
-        '*' => '/^[*]((?:\\\\\*|[^*]|[*][*][^*]+?[*][*])+?)[*](?![*])/s',
-        '_' => '/^_((?:\\\\_|[^_]|__[^_]*__)+?)_(?!_)\b/us',
-    );
-
-    protected $regexHtmlAttribute = '[a-zA-Z_:][\w:.-]*(?:\s*=\s*(?:[^"\'=<>`\s]+|"[^"]*"|\'[^\']*\'))?';
-
-    protected $voidElements = array(
-        'area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source',
-    );
-
-    protected $textLevelElements = array(
-        'a', 'br', 'bdo', 'abbr', 'blink', 'nextid', 'acronym', 'basefont',
-        'b', 'em', 'big', 'cite', 'small', 'spacer', 'listing',
-        'i', 'rp', 'del', 'code',          'strike', 'marquee',
-        'q', 'rt', 'ins', 'font',          'strong',
-        's', 'tt', 'sub', 'mark',
-        'u', 'xm', 'sup', 'nobr',
-                   'var', 'ruby',
-                   'wbr', 'span',
-                          'time',
-    );
-}
diff --git a/wcfsetup/install/files/lib/system/api/parsedown/README.md b/wcfsetup/install/files/lib/system/api/parsedown/README.md
deleted file mode 100644
index 8d485e7d27..0000000000
--- a/wcfsetup/install/files/lib/system/api/parsedown/README.md
+++ /dev/null
@@ -1,48 +0,0 @@
-## Parsedown
-
-Better Markdown Parser in PHP
-
-[[ demo ]](http://parsedown.org/demo)
-
-### Features
-
-* [Fast](http://parsedown.org/speed)
-* [Consistent](http://parsedown.org/consistency)
-* [GitHub flavored](https://help.github.com/articles/github-flavored-markdown)
-* [Tested](http://parsedown.org/tests/) in PHP 5.2, 5.3, 5.4, 5.5, 5.6 and [hhvm](http://www.hhvm.com/)
-* [Extensible](https://github.com/erusev/parsedown/wiki/Writing-Extensions)
-* [Markdown Extra extension](https://github.com/erusev/parsedown-extra)
-
-### Installation
-
-Include `Parsedown.php` or install [the composer package](https://packagist.org/packages/erusev/parsedown).
-
-### Example
-
-``` php
-$Parsedown = new Parsedown();
-
-echo $Parsedown->text('Hello _Parsedown_!'); # prints: <p>Hello <em>Parsedown</em>!</p>
-```
-
-More examples in [the wiki](https://github.com/erusev/parsedown/wiki/Usage) and in [this video tutorial](http://youtu.be/wYZBY8DEikI).
-
-### Questions
-
-**How does Parsedown work?**
-
-It tries to read Markdown like a human. First, it looks at the lines. It’s interested in how the lines start. This helps it recognise blocks. It knows, for example, that if a line start with a `-` then it perhaps belong to a list. Once it recognises the blocks, it continues to the content. As it reads, it watches out for special characters. This helps it recognise inline elements (or inlines).
-
-We call this approach "line based". We believe that Parsedown is the first Markdown parser to use it. Since the release of Parsedown, other developers have used the same approach to develop other Markdown parsers in PHP and in other languages.
-
-**Is it compliant with CommonMark?**
-
-It passes most of the CommonMark tests. Most of the tests that don't pass deal with cases that are quite uncommon. Still, as CommonMark matures, compliance should improve.
-
-**Who uses it?**
-
-[phpDocumentor](http://www.phpdoc.org/), [October CMS](http://octobercms.com/), [Bolt CMS](http://bolt.cm/), [Kirby CMS](http://getkirby.com/), [Grav CMS](http://getgrav.org/), [Statamic CMS](http://www.statamic.com/),  [RaspberryPi.org](http://www.raspberrypi.org/) and [more](https://www.versioneye.com/php/erusev:parsedown/references).
-
-**How can I help?**
-
-Use it, star it, share it and if you feel generous, [donate some money](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=528P3NZQMP8N2).
diff --git a/wcfsetup/install/files/lib/system/api/parsedown/version b/wcfsetup/install/files/lib/system/api/parsedown/version
deleted file mode 100644
index b41a6383c6..0000000000
--- a/wcfsetup/install/files/lib/system/api/parsedown/version
+++ /dev/null
@@ -1 +0,0 @@
-Version of parsedown is 1.5.1