diff --git a/README.md b/README.md
index 424d2696..fb5d7e46 100644
--- a/README.md
+++ b/README.md
@@ -60,10 +60,11 @@
 
 如何更新到最新版？
 ---
-升级过程并不复杂，但也简单粗暴，总共分为三个步骤。
+升级过程并不复杂，但也简单粗暴，总共分为四个步骤。
 1. [下载](https://github.com/wisp-x/lsky-pro/releases)最新版程序并解压到本地。
-2. 将旧版程序 ```config/db.php``` 文件复制到新版程序的 ```config``` 文件夹，如果你使用的是本地储存策略，文件是储存在本地的，请注意也要将你旧版本的图片资源移动到新程序对应的目录。
-3. 删除旧版本程序所有文件，上传最新版程序到站点根目录即可(这一步也可以直接覆盖，但会有残留文件，不选择覆盖的话建议先打包备份旧版本)。
+2. 导入根目录update.sql文件到数据库(不存在这个文件可跳过这一步)
+3. 将旧版程序 ```config/db.php``` 文件复制到新版程序的 ```config``` 文件夹，如果你使用的是本地储存策略，文件是储存在本地的，请注意也要将你旧版本的图片资源移动到新程序对应的目录。
+4. 删除旧版本程序所有文件，上传最新版程序到站点根目录即可(这一步也可以直接覆盖，但会有残留文件，不选择覆盖的话建议先打包备份旧版本)。
 
 如何修改网站运行目录？
 ---
diff --git a/application/index/view/common/base.html b/application/index/view/common/base.html
index 871e25b1..808f280b 100644
--- a/application/index/view/common/base.html
+++ b/application/index/view/common/base.html
@@ -26,6 +26,10 @@
     <a href="{:url('/')}" class="mdui-typo-headline">{$config.site_name}</a>
     <div class="mdui-toolbar-spacer"></div>
     {if $user}
+      <!-- Update -->
+      {if $user.is_admin}
+      <span id="update" class="mdui-btn mdui-btn-icon"><i class="mdui-icon material-icons">&#xe923;</i></span>
+      {/if}
     <!-- User -->
     <a href="javascript:void(0)" mdui-menu="{target: '#user'}" class="mdui-btn mdui-btn-icon"><i class="mdui-icon material-icons">&#xe853;</i></a>
     <ul class="mdui-menu" id="user">
@@ -128,9 +132,11 @@
 {/block}
 <script src="/static/jquery/3.3.1/jquery.min.js"></script>
 <script src="/static/mdui/0.4.1/js/mdui.min.js"></script>
+<script src="/static/marked/0.5.1/marked.js"></script>
 <script src="/static/app/js/app.js"></script>
 {block name="js"}{/block}
 <script>
+  var thatVer = '{$config.system_version}';
   $(function () {
     var toTop = $("#to-top"), toTopHide = function () {
       if ($(window).scrollTop() > 50) {
@@ -155,7 +161,16 @@
         app.cookie.set('menu', $('body').hasClass('mdui-drawer-body-left') ? 'open' : 'close', 10, '/');
       }
     });
+
+    $('#update').click(function () {
+      app.update(thatVer, true);
+    });
   });
 </script>
+{if $user and $user.is_admin and !cookie('?no_update')}
+<script>
+  app.update(thatVer, false);
+</script>
+{/if}
 </body>
 </html>
diff --git a/public/static/app/js/app.js b/public/static/app/js/app.js
index 4baf48f2..db0efe5a 100644
--- a/public/static/app/js/app.js
+++ b/public/static/app/js/app.js
@@ -101,8 +101,16 @@ var app = {
      */
     delete: function (key) {
       var date = new Date();
-      date.setTime(date.getTime() - 10000);
-      document.cookie = key + "=v; expires =" + date.toGMTString();
+      date.setTime(date.getTime() - 1);
+      document.cookie = key + "=; expires=" + date.toGMTString() + ";path=/";
+    },
+    /**
+     * Has
+     * @param key
+     * @returns {boolean}
+     */
+    has: function (key) {
+      return app.cookie.get(key) ? true : false;
     }
   },
   /**
@@ -114,5 +122,44 @@ var app = {
     if (bytes === 0) return '0 B';
     var k = 1024, sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'], i = Math.floor(Math.log(bytes) / Math.log(k));
     return (bytes / Math.pow(k, i)).toFixed(2) + ' ' + sizes[i];
+  },
+  update: function (ver, auto) {
+    $.ajax({
+      url: 'https://api.github.com/repos/wisp-x/lsky-pro/releases/latest',
+        success: function (response) {
+          var thatVer = parseFloat(ver);
+          var newVer = parseFloat(response.name.replace(/[^\d.]/g, ''));
+          if (thatVer < newVer) {
+            if (!app.cookie.has('no_update') || auto) {
+              mdui.dialog({
+                title: '检测到新版本[' + response.name + ']',
+                content: '<div class="mdui-p-l-3 mdui-p-r-3">' + marked(response.body) + '</div>',
+                modal: true,
+                history: false,
+                buttons: [
+                  {
+                    text: '忽略'
+                  },
+                  {
+                    text: '不再提示',
+                    onClick: function(inst) {
+                      app.cookie.set('no_update', true, 30, '/');
+                    }
+                  },
+                  {
+                    text: '前往更新',
+                    onClick: function(inst) {
+                      return open(response.html_url);
+                    }
+                  }
+                 ]
+              });
+            }
+          } else {
+            auto && app.msg(true, '已经是最新版本');
+          }
+          auto && app.cookie.delete('no_update');
+        }
+    });
   }
-};
\ No newline at end of file
+};
diff --git a/public/static/marked/0.5.1/marked.js b/public/static/marked/0.5.1/marked.js
new file mode 100644
index 00000000..c12802ed
--- /dev/null
+++ b/public/static/marked/0.5.1/marked.js
@@ -0,0 +1,1604 @@
+/**
+ * marked - a markdown parser
+ * Copyright (c) 2011-2018, Christopher Jeffrey. (MIT Licensed)
+ * https://github.com/markedjs/marked
+ */
+
+;(function(root) {
+    'use strict';
+
+    /**
+     * Block-Level Grammar
+     */
+
+    var block = {
+        newline: /^\n+/,
+        code: /^( {4}[^\n]+\n*)+/,
+        fences: noop,
+        hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
+        heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
+        nptable: noop,
+        blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+        list: /^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
+        html: '^ {0,3}(?:' // optional indentation
+            + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+            + '|comment[^\\n]*(\\n+|$)' // (2)
+            + '|<\\?[\\s\\S]*?\\?>\\n*' // (3)
+            + '|<![A-Z][\\s\\S]*?>\\n*' // (4)
+            + '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' // (5)
+            + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
+            + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
+            + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
+            + ')',
+        def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
+        table: noop,
+        lheading: /^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,
+        paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading| {0,3}>|<\/?(?:tag)(?: +|\n|\/?>)|<(?:script|pre|style|!--))[^\n]+)*)/,
+        text: /^[^\n]+/
+    };
+
+    block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
+    block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+    block.def = edit(block.def)
+        .replace('label', block._label)
+        .replace('title', block._title)
+        .getRegex();
+
+    block.bullet = /(?:[*+-]|\d+\.)/;
+    block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;
+    block.item = edit(block.item, 'gm')
+        .replace(/bull/g, block.bullet)
+        .getRegex();
+
+    block.list = edit(block.list)
+        .replace(/bull/g, block.bullet)
+        .replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
+        .replace('def', '\\n+(?=' + block.def.source + ')')
+        .getRegex();
+
+    block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
+        + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
+        + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
+        + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
+        + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
+        + '|track|ul';
+    block._comment = /<!--(?!-?>)[\s\S]*?-->/;
+    block.html = edit(block.html, 'i')
+        .replace('comment', block._comment)
+        .replace('tag', block._tag)
+        .replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
+        .getRegex();
+
+    block.paragraph = edit(block.paragraph)
+        .replace('hr', block.hr)
+        .replace('heading', block.heading)
+        .replace('lheading', block.lheading)
+        .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
+        .getRegex();
+
+    block.blockquote = edit(block.blockquote)
+        .replace('paragraph', block.paragraph)
+        .getRegex();
+
+    /**
+     * Normal Block Grammar
+     */
+
+    block.normal = merge({}, block);
+
+    /**
+     * GFM Block Grammar
+     */
+
+    block.gfm = merge({}, block.normal, {
+        fences: /^ *(`{3,}|~{3,})[ \.]*(\S+)? *\n([\s\S]*?)\n? *\1 *(?:\n+|$)/,
+        paragraph: /^/,
+        heading: /^ *(#{1,6}) +([^\n]+?) *#* *(?:\n+|$)/
+    });
+
+    block.gfm.paragraph = edit(block.paragraph)
+        .replace('(?!', '(?!'
+            + block.gfm.fences.source.replace('\\1', '\\2') + '|'
+            + block.list.source.replace('\\1', '\\3') + '|')
+        .getRegex();
+
+    /**
+     * GFM + Tables Block Grammar
+     */
+
+    block.tables = merge({}, block.gfm, {
+        nptable: /^ *([^|\n ].*\|.*)\n *([-:]+ *\|[-| :]*)(?:\n((?:.*[^>\n ].*(?:\n|$))*)\n*|$)/,
+        table: /^ *\|(.+)\n *\|?( *[-:]+[-| :]*)(?:\n((?: *[^>\n ].*(?:\n|$))*)\n*|$)/
+    });
+
+    /**
+     * Pedantic grammar
+     */
+
+    block.pedantic = merge({}, block.normal, {
+        html: edit(
+            '^ *(?:comment *(?:\\n|\\s*$)'
+            + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+            + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
+            .replace('comment', block._comment)
+            .replace(/tag/g, '(?!(?:'
+                + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
+                + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
+                + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
+            .getRegex(),
+        def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/
+    });
+
+    /**
+     * Block Lexer
+     */
+
+    function Lexer(options) {
+        this.tokens = [];
+        this.tokens.links = Object.create(null);
+        this.options = options || marked.defaults;
+        this.rules = block.normal;
+
+        if (this.options.pedantic) {
+            this.rules = block.pedantic;
+        } else if (this.options.gfm) {
+            if (this.options.tables) {
+                this.rules = block.tables;
+            } else {
+                this.rules = block.gfm;
+            }
+        }
+    }
+
+    /**
+     * Expose Block Rules
+     */
+
+    Lexer.rules = block;
+
+    /**
+     * Static Lex Method
+     */
+
+    Lexer.lex = function(src, options) {
+        var lexer = new Lexer(options);
+        return lexer.lex(src);
+    };
+
+    /**
+     * Preprocessing
+     */
+
+    Lexer.prototype.lex = function(src) {
+        src = src
+            .replace(/\r\n|\r/g, '\n')
+            .replace(/\t/g, '    ')
+            .replace(/\u00a0/g, ' ')
+            .replace(/\u2424/g, '\n');
+
+        return this.token(src, true);
+    };
+
+    /**
+     * Lexing
+     */
+
+    Lexer.prototype.token = function(src, top) {
+        src = src.replace(/^ +$/gm, '');
+        var next,
+            loose,
+            cap,
+            bull,
+            b,
+            item,
+            listStart,
+            listItems,
+            t,
+            space,
+            i,
+            tag,
+            l,
+            isordered,
+            istask,
+            ischecked;
+
+        while (src) {
+            // newline
+            if (cap = this.rules.newline.exec(src)) {
+                src = src.substring(cap[0].length);
+                if (cap[0].length > 1) {
+                    this.tokens.push({
+                        type: 'space'
+                    });
+                }
+            }
+
+            // code
+            if (cap = this.rules.code.exec(src)) {
+                src = src.substring(cap[0].length);
+                cap = cap[0].replace(/^ {4}/gm, '');
+                this.tokens.push({
+                    type: 'code',
+                    text: !this.options.pedantic
+                        ? rtrim(cap, '\n')
+                        : cap
+                });
+                continue;
+            }
+
+            // fences (gfm)
+            if (cap = this.rules.fences.exec(src)) {
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: 'code',
+                    lang: cap[2],
+                    text: cap[3] || ''
+                });
+                continue;
+            }
+
+            // heading
+            if (cap = this.rules.heading.exec(src)) {
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: 'heading',
+                    depth: cap[1].length,
+                    text: cap[2]
+                });
+                continue;
+            }
+
+            // table no leading pipe (gfm)
+            if (top && (cap = this.rules.nptable.exec(src))) {
+                item = {
+                    type: 'table',
+                    header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                    align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                    cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+                };
+
+                if (item.header.length === item.align.length) {
+                    src = src.substring(cap[0].length);
+
+                    for (i = 0; i < item.align.length; i++) {
+                        if (/^ *-+: *$/.test(item.align[i])) {
+                            item.align[i] = 'right';
+                        } else if (/^ *:-+: *$/.test(item.align[i])) {
+                            item.align[i] = 'center';
+                        } else if (/^ *:-+ *$/.test(item.align[i])) {
+                            item.align[i] = 'left';
+                        } else {
+                            item.align[i] = null;
+                        }
+                    }
+
+                    for (i = 0; i < item.cells.length; i++) {
+                        item.cells[i] = splitCells(item.cells[i], item.header.length);
+                    }
+
+                    this.tokens.push(item);
+
+                    continue;
+                }
+            }
+
+            // hr
+            if (cap = this.rules.hr.exec(src)) {
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: 'hr'
+                });
+                continue;
+            }
+
+            // blockquote
+            if (cap = this.rules.blockquote.exec(src)) {
+                src = src.substring(cap[0].length);
+
+                this.tokens.push({
+                    type: 'blockquote_start'
+                });
+
+                cap = cap[0].replace(/^ *> ?/gm, '');
+
+                // Pass `top` to keep the current
+                // "toplevel" state. This is exactly
+                // how markdown.pl works.
+                this.token(cap, top);
+
+                this.tokens.push({
+                    type: 'blockquote_end'
+                });
+
+                continue;
+            }
+
+            // list
+            if (cap = this.rules.list.exec(src)) {
+                src = src.substring(cap[0].length);
+                bull = cap[2];
+                isordered = bull.length > 1;
+
+                listStart = {
+                    type: 'list_start',
+                    ordered: isordered,
+                    start: isordered ? +bull : '',
+                    loose: false
+                };
+
+                this.tokens.push(listStart);
+
+                // Get each top-level item.
+                cap = cap[0].match(this.rules.item);
+
+                listItems = [];
+                next = false;
+                l = cap.length;
+                i = 0;
+
+                for (; i < l; i++) {
+                    item = cap[i];
+
+                    // Remove the list item's bullet
+                    // so it is seen as the next token.
+                    space = item.length;
+                    item = item.replace(/^ *([*+-]|\d+\.) +/, '');
+
+                    // Outdent whatever the
+                    // list item contains. Hacky.
+                    if (~item.indexOf('\n ')) {
+                        space -= item.length;
+                        item = !this.options.pedantic
+                            ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
+                            : item.replace(/^ {1,4}/gm, '');
+                    }
+
+                    // Determine whether the next list item belongs here.
+                    // Backpedal if it does not belong in this list.
+                    if (this.options.smartLists && i !== l - 1) {
+                        b = block.bullet.exec(cap[i + 1])[0];
+                        if (bull !== b && !(bull.length > 1 && b.length > 1)) {
+                            src = cap.slice(i + 1).join('\n') + src;
+                            i = l - 1;
+                        }
+                    }
+
+                    // Determine whether item is loose or not.
+                    // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+                    // for discount behavior.
+                    loose = next || /\n\n(?!\s*$)/.test(item);
+                    if (i !== l - 1) {
+                        next = item.charAt(item.length - 1) === '\n';
+                        if (!loose) loose = next;
+                    }
+
+                    if (loose) {
+                        listStart.loose = true;
+                    }
+
+                    // Check for task list items
+                    istask = /^\[[ xX]\] /.test(item);
+                    ischecked = undefined;
+                    if (istask) {
+                        ischecked = item[1] !== ' ';
+                        item = item.replace(/^\[[ xX]\] +/, '');
+                    }
+
+                    t = {
+                        type: 'list_item_start',
+                        task: istask,
+                        checked: ischecked,
+                        loose: loose
+                    };
+
+                    listItems.push(t);
+                    this.tokens.push(t);
+
+                    // Recurse.
+                    this.token(item, false);
+
+                    this.tokens.push({
+                        type: 'list_item_end'
+                    });
+                }
+
+                if (listStart.loose) {
+                    l = listItems.length;
+                    i = 0;
+                    for (; i < l; i++) {
+                        listItems[i].loose = true;
+                    }
+                }
+
+                this.tokens.push({
+                    type: 'list_end'
+                });
+
+                continue;
+            }
+
+            // html
+            if (cap = this.rules.html.exec(src)) {
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: this.options.sanitize
+                        ? 'paragraph'
+                        : 'html',
+                    pre: !this.options.sanitizer
+                        && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+                    text: cap[0]
+                });
+                continue;
+            }
+
+            // def
+            if (top && (cap = this.rules.def.exec(src))) {
+                src = src.substring(cap[0].length);
+                if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
+                tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+                if (!this.tokens.links[tag]) {
+                    this.tokens.links[tag] = {
+                        href: cap[2],
+                        title: cap[3]
+                    };
+                }
+                continue;
+            }
+
+            // table (gfm)
+            if (top && (cap = this.rules.table.exec(src))) {
+                item = {
+                    type: 'table',
+                    header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                    align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                    cells: cap[3] ? cap[3].replace(/(?: *\| *)?\n$/, '').split('\n') : []
+                };
+
+                if (item.header.length === item.align.length) {
+                    src = src.substring(cap[0].length);
+
+                    for (i = 0; i < item.align.length; i++) {
+                        if (/^ *-+: *$/.test(item.align[i])) {
+                            item.align[i] = 'right';
+                        } else if (/^ *:-+: *$/.test(item.align[i])) {
+                            item.align[i] = 'center';
+                        } else if (/^ *:-+ *$/.test(item.align[i])) {
+                            item.align[i] = 'left';
+                        } else {
+                            item.align[i] = null;
+                        }
+                    }
+
+                    for (i = 0; i < item.cells.length; i++) {
+                        item.cells[i] = splitCells(
+                            item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
+                            item.header.length);
+                    }
+
+                    this.tokens.push(item);
+
+                    continue;
+                }
+            }
+
+            // lheading
+            if (cap = this.rules.lheading.exec(src)) {
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: 'heading',
+                    depth: cap[2] === '=' ? 1 : 2,
+                    text: cap[1]
+                });
+                continue;
+            }
+
+            // top-level paragraph
+            if (top && (cap = this.rules.paragraph.exec(src))) {
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: 'paragraph',
+                    text: cap[1].charAt(cap[1].length - 1) === '\n'
+                        ? cap[1].slice(0, -1)
+                        : cap[1]
+                });
+                continue;
+            }
+
+            // text
+            if (cap = this.rules.text.exec(src)) {
+                // Top-level should never reach here.
+                src = src.substring(cap[0].length);
+                this.tokens.push({
+                    type: 'text',
+                    text: cap[0]
+                });
+                continue;
+            }
+
+            if (src) {
+                throw new Error('Infinite loop on byte: ' + src.charCodeAt(0));
+            }
+        }
+
+        return this.tokens;
+    };
+
+    /**
+     * Inline-Level Grammar
+     */
+
+    var inline = {
+        escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+        autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+        url: noop,
+        tag: '^comment'
+            + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+            + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+            + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+            + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+            + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
+        link: /^!?\[(label)\]\(href(?:\s+(title))?\s*\)/,
+        reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
+        nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
+        strong: /^__([^\s])__(?!_)|^\*\*([^\s])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
+        em: /^_([^\s_])_(?!_)|^\*([^\s*"<\[])\*(?!\*)|^_([^\s][\s\S]*?[^\s_])_(?!_)|^_([^\s_][\s\S]*?[^\s])_(?!_)|^\*([^\s"<\[][\s\S]*?[^\s*])\*(?!\*)|^\*([^\s*"<\[][\s\S]*?[^\s])\*(?!\*)/,
+        code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+        br: /^( {2,}|\\)\n(?!\s*$)/,
+        del: noop,
+        text: /^(`+|[^`])[\s\S]*?(?=[\\<!\[`*]|\b_| {2,}\n|$)/
+    };
+
+    inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+
+    inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+    inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+    inline.autolink = edit(inline.autolink)
+        .replace('scheme', inline._scheme)
+        .replace('email', inline._email)
+        .getRegex();
+
+    inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+
+    inline.tag = edit(inline.tag)
+        .replace('comment', block._comment)
+        .replace('attribute', inline._attribute)
+        .getRegex();
+
+    inline._label = /(?:\[[^\[\]]*\]|\\[\[\]]?|`[^`]*`|[^\[\]\\])*?/;
+    inline._href = /\s*(<(?:\\[<>]?|[^\s<>\\])*>|(?:\\[()]?|\([^\s\x00-\x1f\\]*\)|[^\s\x00-\x1f()\\])*?)/;
+    inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+
+    inline.link = edit(inline.link)
+        .replace('label', inline._label)
+        .replace('href', inline._href)
+        .replace('title', inline._title)
+        .getRegex();
+
+    inline.reflink = edit(inline.reflink)
+        .replace('label', inline._label)
+        .getRegex();
+
+    /**
+     * Normal Inline Grammar
+     */
+
+    inline.normal = merge({}, inline);
+
+    /**
+     * Pedantic Inline Grammar
+     */
+
+    inline.pedantic = merge({}, inline.normal, {
+        strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+        em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
+        link: edit(/^!?\[(label)\]\((.*?)\)/)
+            .replace('label', inline._label)
+            .getRegex(),
+        reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/)
+            .replace('label', inline._label)
+            .getRegex()
+    });
+
+    /**
+     * GFM Inline Grammar
+     */
+
+    inline.gfm = merge({}, inline.normal, {
+        escape: edit(inline.escape).replace('])', '~|])').getRegex(),
+        _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+        url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+        _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
+        del: /^~+(?=\S)([\s\S]*?\S)~+/,
+        text: edit(inline.text)
+            .replace(']|', '~]|')
+            .replace('|$', '|https?://|ftp://|www\\.|[a-zA-Z0-9.!#$%&\'*+/=?^_`{\\|}~-]+@|$')
+            .getRegex()
+    });
+
+    inline.gfm.url = edit(inline.gfm.url)
+        .replace('email', inline.gfm._extended_email)
+        .getRegex();
+    /**
+     * GFM + Line Breaks Inline Grammar
+     */
+
+    inline.breaks = merge({}, inline.gfm, {
+        br: edit(inline.br).replace('{2,}', '*').getRegex(),
+        text: edit(inline.gfm.text).replace('{2,}', '*').getRegex()
+    });
+
+    /**
+     * Inline Lexer & Compiler
+     */
+
+    function InlineLexer(links, options) {
+        this.options = options || marked.defaults;
+        this.links = links;
+        this.rules = inline.normal;
+        this.renderer = this.options.renderer || new Renderer();
+        this.renderer.options = this.options;
+
+        if (!this.links) {
+            throw new Error('Tokens array requires a `links` property.');
+        }
+
+        if (this.options.pedantic) {
+            this.rules = inline.pedantic;
+        } else if (this.options.gfm) {
+            if (this.options.breaks) {
+                this.rules = inline.breaks;
+            } else {
+                this.rules = inline.gfm;
+            }
+        }
+    }
+
+    /**
+     * Expose Inline Rules
+     */
+
+    InlineLexer.rules = inline;
+
+    /**
+     * Static Lexing/Compiling Method
+     */
+
+    InlineLexer.output = function(src, links, options) {
+        var inline = new InlineLexer(links, options);
+        return inline.output(src);
+    };
+
+    /**
+     * Lexing/Compiling
+     */
+
+    InlineLexer.prototype.output = function(src) {
+        var out = '',
+            link,
+            text,
+            href,
+            title,
+            cap,
+            prevCapZero;
+
+        while (src) {
+            // escape
+            if (cap = this.rules.escape.exec(src)) {
+                src = src.substring(cap[0].length);
+                out += cap[1];
+                continue;
+            }
+
+            // autolink
+            if (cap = this.rules.autolink.exec(src)) {
+                src = src.substring(cap[0].length);
+                if (cap[2] === '@') {
+                    text = escape(this.mangle(cap[1]));
+                    href = 'mailto:' + text;
+                } else {
+                    text = escape(cap[1]);
+                    href = text;
+                }
+                out += this.renderer.link(href, null, text);
+                continue;
+            }
+
+            // url (gfm)
+            if (!this.inLink && (cap = this.rules.url.exec(src))) {
+                if (cap[2] === '@') {
+                    text = escape(cap[0]);
+                    href = 'mailto:' + text;
+                } else {
+                    // do extended autolink path validation
+                    do {
+                        prevCapZero = cap[0];
+                        cap[0] = this.rules._backpedal.exec(cap[0])[0];
+                    } while (prevCapZero !== cap[0]);
+                    text = escape(cap[0]);
+                    if (cap[1] === 'www.') {
+                        href = 'http://' + text;
+                    } else {
+                        href = text;
+                    }
+                }
+                src = src.substring(cap[0].length);
+                out += this.renderer.link(href, null, text);
+                continue;
+            }
+
+            // tag
+            if (cap = this.rules.tag.exec(src)) {
+                if (!this.inLink && /^<a /i.test(cap[0])) {
+                    this.inLink = true;
+                } else if (this.inLink && /^<\/a>/i.test(cap[0])) {
+                    this.inLink = false;
+                }
+                if (!this.inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                    this.inRawBlock = true;
+                } else if (this.inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                    this.inRawBlock = false;
+                }
+
+                src = src.substring(cap[0].length);
+                out += this.options.sanitize
+                    ? this.options.sanitizer
+                        ? this.options.sanitizer(cap[0])
+                        : escape(cap[0])
+                    : cap[0]
+                continue;
+            }
+
+            // link
+            if (cap = this.rules.link.exec(src)) {
+                src = src.substring(cap[0].length);
+                this.inLink = true;
+                href = cap[2];
+                if (this.options.pedantic) {
+                    link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+
+                    if (link) {
+                        href = link[1];
+                        title = link[3];
+                    } else {
+                        title = '';
+                    }
+                } else {
+                    title = cap[3] ? cap[3].slice(1, -1) : '';
+                }
+                href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
+                out += this.outputLink(cap, {
+                    href: InlineLexer.escapes(href),
+                    title: InlineLexer.escapes(title)
+                });
+                this.inLink = false;
+                continue;
+            }
+
+            // reflink, nolink
+            if ((cap = this.rules.reflink.exec(src))
+                || (cap = this.rules.nolink.exec(src))) {
+                src = src.substring(cap[0].length);
+                link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+                link = this.links[link.toLowerCase()];
+                if (!link || !link.href) {
+                    out += cap[0].charAt(0);
+                    src = cap[0].substring(1) + src;
+                    continue;
+                }
+                this.inLink = true;
+                out += this.outputLink(cap, link);
+                this.inLink = false;
+                continue;
+            }
+
+            // strong
+            if (cap = this.rules.strong.exec(src)) {
+                src = src.substring(cap[0].length);
+                out += this.renderer.strong(this.output(cap[4] || cap[3] || cap[2] || cap[1]));
+                continue;
+            }
+
+            // em
+            if (cap = this.rules.em.exec(src)) {
+                src = src.substring(cap[0].length);
+                out += this.renderer.em(this.output(cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]));
+                continue;
+            }
+
+            // code
+            if (cap = this.rules.code.exec(src)) {
+                src = src.substring(cap[0].length);
+                out += this.renderer.codespan(escape(cap[2].trim(), true));
+                continue;
+            }
+
+            // br
+            if (cap = this.rules.br.exec(src)) {
+                src = src.substring(cap[0].length);
+                out += this.renderer.br();
+                continue;
+            }
+
+            // del (gfm)
+            if (cap = this.rules.del.exec(src)) {
+                src = src.substring(cap[0].length);
+                out += this.renderer.del(this.output(cap[1]));
+                continue;
+            }
+
+            // text
+            if (cap = this.rules.text.exec(src)) {
+                src = src.substring(cap[0].length);
+                if (this.inRawBlock) {
+                    out += this.renderer.text(cap[0]);
+                } else {
+                    out += this.renderer.text(escape(this.smartypants(cap[0])));
+                }
+                continue;
+            }
+
+            if (src) {
+                throw new Error('Infinite loop on byte: ' + src.charCodeAt(0));
+            }
+        }
+
+        return out;
+    };
+
+    InlineLexer.escapes = function(text) {
+        return text ? text.replace(InlineLexer.rules._escapes, '$1') : text;
+    }
+
+    /**
+     * Compile Link
+     */
+
+    InlineLexer.prototype.outputLink = function(cap, link) {
+        var href = link.href,
+            title = link.title ? escape(link.title) : null;
+
+        return cap[0].charAt(0) !== '!'
+            ? this.renderer.link(href, title, this.output(cap[1]))
+            : this.renderer.image(href, title, escape(cap[1]));
+    };
+
+    /**
+     * Smartypants Transformations
+     */
+
+    InlineLexer.prototype.smartypants = function(text) {
+        if (!this.options.smartypants) return text;
+        return text
+        // em-dashes
+            .replace(/---/g, '\u2014')
+            // en-dashes
+            .replace(/--/g, '\u2013')
+            // opening singles
+            .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
+            // closing singles & apostrophes
+            .replace(/'/g, '\u2019')
+            // opening doubles
+            .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
+            // closing doubles
+            .replace(/"/g, '\u201d')
+            // ellipses
+            .replace(/\.{3}/g, '\u2026');
+    };
+
+    /**
+     * Mangle Links
+     */
+
+    InlineLexer.prototype.mangle = function(text) {
+        if (!this.options.mangle) return text;
+        var out = '',
+            l = text.length,
+            i = 0,
+            ch;
+
+        for (; i < l; i++) {
+            ch = text.charCodeAt(i);
+            if (Math.random() > 0.5) {
+                ch = 'x' + ch.toString(16);
+            }
+            out += '&#' + ch + ';';
+        }
+
+        return out;
+    };
+
+    /**
+     * Renderer
+     */
+
+    function Renderer(options) {
+        this.options = options || marked.defaults;
+    }
+
+    Renderer.prototype.code = function(code, lang, escaped) {
+        if (this.options.highlight) {
+            var out = this.options.highlight(code, lang);
+            if (out != null && out !== code) {
+                escaped = true;
+                code = out;
+            }
+        }
+
+        if (!lang) {
+            return '<pre><code>'
+                + (escaped ? code : escape(code, true))
+                + '</code></pre>';
+        }
+
+        return '<pre><code class="'
+            + this.options.langPrefix
+            + escape(lang, true)
+            + '">'
+            + (escaped ? code : escape(code, true))
+            + '</code></pre>\n';
+    };
+
+    Renderer.prototype.blockquote = function(quote) {
+        return '<blockquote>\n' + quote + '</blockquote>\n';
+    };
+
+    Renderer.prototype.html = function(html) {
+        return html;
+    };
+
+    Renderer.prototype.heading = function(text, level, raw) {
+        if (this.options.headerIds) {
+            return '<h'
+                + level
+                + ' id="'
+                + this.options.headerPrefix
+                + raw.toLowerCase().replace(/[^\w]+/g, '-')
+                + '">'
+                + text
+                + '</h'
+                + level
+                + '>\n';
+        }
+        // ignore IDs
+        return '<h' + level + '>' + text + '</h' + level + '>\n';
+    };
+
+    Renderer.prototype.hr = function() {
+        return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+    };
+
+    Renderer.prototype.list = function(body, ordered, start) {
+        var type = ordered ? 'ol' : 'ul',
+            startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
+        return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+    };
+
+    Renderer.prototype.listitem = function(text) {
+        return '<li>' + text + '</li>\n';
+    };
+
+    Renderer.prototype.checkbox = function(checked) {
+        return '<input '
+            + (checked ? 'checked="" ' : '')
+            + 'disabled="" type="checkbox"'
+            + (this.options.xhtml ? ' /' : '')
+            + '> ';
+    }
+
+    Renderer.prototype.paragraph = function(text) {
+        return '<p>' + text + '</p>\n';
+    };
+
+    Renderer.prototype.table = function(header, body) {
+        if (body) body = '<tbody>' + body + '</tbody>';
+
+        return '<table>\n'
+            + '<thead>\n'
+            + header
+            + '</thead>\n'
+            + body
+            + '</table>\n';
+    };
+
+    Renderer.prototype.tablerow = function(content) {
+        return '<tr>\n' + content + '</tr>\n';
+    };
+
+    Renderer.prototype.tablecell = function(content, flags) {
+        var type = flags.header ? 'th' : 'td';
+        var tag = flags.align
+            ? '<' + type + ' align="' + flags.align + '">'
+            : '<' + type + '>';
+        return tag + content + '</' + type + '>\n';
+    };
+
+// span level renderer
+    Renderer.prototype.strong = function(text) {
+        return '<strong>' + text + '</strong>';
+    };
+
+    Renderer.prototype.em = function(text) {
+        return '<em>' + text + '</em>';
+    };
+
+    Renderer.prototype.codespan = function(text) {
+        return '<code>' + text + '</code>';
+    };
+
+    Renderer.prototype.br = function() {
+        return this.options.xhtml ? '<br/>' : '<br>';
+    };
+
+    Renderer.prototype.del = function(text) {
+        return '<del>' + text + '</del>';
+    };
+
+    Renderer.prototype.link = function(href, title, text) {
+        if (this.options.sanitize) {
+            try {
+                var prot = decodeURIComponent(unescape(href))
+                    .replace(/[^\w:]/g, '')
+                    .toLowerCase();
+            } catch (e) {
+                return text;
+            }
+            if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+                return text;
+            }
+        }
+        if (this.options.baseUrl && !originIndependentUrl.test(href)) {
+            href = resolveUrl(this.options.baseUrl, href);
+        }
+        try {
+            href = encodeURI(href).replace(/%25/g, '%');
+        } catch (e) {
+            return text;
+        }
+        var out = '<a href="' + escape(href) + '"';
+        if (title) {
+            out += ' title="' + title + '"';
+        }
+        out += '>' + text + '</a>';
+        return out;
+    };
+
+    Renderer.prototype.image = function(href, title, text) {
+        if (this.options.baseUrl && !originIndependentUrl.test(href)) {
+            href = resolveUrl(this.options.baseUrl, href);
+        }
+        var out = '<img src="' + href + '" alt="' + text + '"';
+        if (title) {
+            out += ' title="' + title + '"';
+        }
+        out += this.options.xhtml ? '/>' : '>';
+        return out;
+    };
+
+    Renderer.prototype.text = function(text) {
+        return text;
+    };
+
+    /**
+     * TextRenderer
+     * returns only the textual part of the token
+     */
+
+    function TextRenderer() {}
+
+// no need for block level renderers
+
+    TextRenderer.prototype.strong =
+        TextRenderer.prototype.em =
+            TextRenderer.prototype.codespan =
+                TextRenderer.prototype.del =
+                    TextRenderer.prototype.text = function (text) {
+                        return text;
+                    }
+
+    TextRenderer.prototype.link =
+        TextRenderer.prototype.image = function(href, title, text) {
+            return '' + text;
+        }
+
+    TextRenderer.prototype.br = function() {
+        return '';
+    }
+
+    /**
+     * Parsing & Compiling
+     */
+
+    function Parser(options) {
+        this.tokens = [];
+        this.token = null;
+        this.options = options || marked.defaults;
+        this.options.renderer = this.options.renderer || new Renderer();
+        this.renderer = this.options.renderer;
+        this.renderer.options = this.options;
+    }
+
+    /**
+     * Static Parse Method
+     */
+
+    Parser.parse = function(src, options) {
+        var parser = new Parser(options);
+        return parser.parse(src);
+    };
+
+    /**
+     * Parse Loop
+     */
+
+    Parser.prototype.parse = function(src) {
+        this.inline = new InlineLexer(src.links, this.options);
+        // use an InlineLexer with a TextRenderer to extract pure text
+        this.inlineText = new InlineLexer(
+            src.links,
+            merge({}, this.options, {renderer: new TextRenderer()})
+        );
+        this.tokens = src.reverse();
+
+        var out = '';
+        while (this.next()) {
+            out += this.tok();
+        }
+
+        return out;
+    };
+
+    /**
+     * Next Token
+     */
+
+    Parser.prototype.next = function() {
+        return this.token = this.tokens.pop();
+    };
+
+    /**
+     * Preview Next Token
+     */
+
+    Parser.prototype.peek = function() {
+        return this.tokens[this.tokens.length - 1] || 0;
+    };
+
+    /**
+     * Parse Text Tokens
+     */
+
+    Parser.prototype.parseText = function() {
+        var body = this.token.text;
+
+        while (this.peek().type === 'text') {
+            body += '\n' + this.next().text;
+        }
+
+        return this.inline.output(body);
+    };
+
+    /**
+     * Parse Current Token
+     */
+
+    Parser.prototype.tok = function() {
+        switch (this.token.type) {
+            case 'space': {
+                return '';
+            }
+            case 'hr': {
+                return this.renderer.hr();
+            }
+            case 'heading': {
+                return this.renderer.heading(
+                    this.inline.output(this.token.text),
+                    this.token.depth,
+                    unescape(this.inlineText.output(this.token.text)));
+            }
+            case 'code': {
+                return this.renderer.code(this.token.text,
+                    this.token.lang,
+                    this.token.escaped);
+            }
+            case 'table': {
+                var header = '',
+                    body = '',
+                    i,
+                    row,
+                    cell,
+                    j;
+
+                // header
+                cell = '';
+                for (i = 0; i < this.token.header.length; i++) {
+                    cell += this.renderer.tablecell(
+                        this.inline.output(this.token.header[i]),
+                        { header: true, align: this.token.align[i] }
+                    );
+                }
+                header += this.renderer.tablerow(cell);
+
+                for (i = 0; i < this.token.cells.length; i++) {
+                    row = this.token.cells[i];
+
+                    cell = '';
+                    for (j = 0; j < row.length; j++) {
+                        cell += this.renderer.tablecell(
+                            this.inline.output(row[j]),
+                            { header: false, align: this.token.align[j] }
+                        );
+                    }
+
+                    body += this.renderer.tablerow(cell);
+                }
+                return this.renderer.table(header, body);
+            }
+            case 'blockquote_start': {
+                body = '';
+
+                while (this.next().type !== 'blockquote_end') {
+                    body += this.tok();
+                }
+
+                return this.renderer.blockquote(body);
+            }
+            case 'list_start': {
+                body = '';
+                var ordered = this.token.ordered,
+                    start = this.token.start;
+
+                while (this.next().type !== 'list_end') {
+                    body += this.tok();
+                }
+
+                return this.renderer.list(body, ordered, start);
+            }
+            case 'list_item_start': {
+                body = '';
+                var loose = this.token.loose;
+
+                if (this.token.task) {
+                    body += this.renderer.checkbox(this.token.checked);
+                }
+
+                while (this.next().type !== 'list_item_end') {
+                    body += !loose && this.token.type === 'text'
+                        ? this.parseText()
+                        : this.tok();
+                }
+
+                return this.renderer.listitem(body);
+            }
+            case 'html': {
+                // TODO parse inline content if parameter markdown=1
+                return this.renderer.html(this.token.text);
+            }
+            case 'paragraph': {
+                return this.renderer.paragraph(this.inline.output(this.token.text));
+            }
+            case 'text': {
+                return this.renderer.paragraph(this.parseText());
+            }
+        }
+    };
+
+    /**
+     * Helpers
+     */
+
+    function escape(html, encode) {
+        if (encode) {
+            if (escape.escapeTest.test(html)) {
+                return html.replace(escape.escapeReplace, function (ch) { return escape.replacements[ch] });
+            }
+        } else {
+            if (escape.escapeTestNoEncode.test(html)) {
+                return html.replace(escape.escapeReplaceNoEncode, function (ch) { return escape.replacements[ch] });
+            }
+        }
+
+        return html;
+    }
+
+    escape.escapeTest = /[&<>"']/;
+    escape.escapeReplace = /[&<>"']/g;
+    escape.replacements = {
+        '&': '&amp;',
+        '<': '&lt;',
+        '>': '&gt;',
+        '"': '&quot;',
+        "'": '&#39;'
+    };
+
+    escape.escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+    escape.escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+
+    function unescape(html) {
+        // explicitly match decimal, hex, and named HTML entities
+        return html.replace(/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig, function(_, n) {
+            n = n.toLowerCase();
+            if (n === 'colon') return ':';
+            if (n.charAt(0) === '#') {
+                return n.charAt(1) === 'x'
+                    ? String.fromCharCode(parseInt(n.substring(2), 16))
+                    : String.fromCharCode(+n.substring(1));
+            }
+            return '';
+        });
+    }
+
+    function edit(regex, opt) {
+        regex = regex.source || regex;
+        opt = opt || '';
+        return {
+            replace: function(name, val) {
+                val = val.source || val;
+                val = val.replace(/(^|[^\[])\^/g, '$1');
+                regex = regex.replace(name, val);
+                return this;
+            },
+            getRegex: function() {
+                return new RegExp(regex, opt);
+            }
+        };
+    }
+
+    function resolveUrl(base, href) {
+        if (!baseUrls[' ' + base]) {
+            // we can ignore everything in base after the last slash of its path component,
+            // but we might need to add _that_
+            // https://tools.ietf.org/html/rfc3986#section-3
+            if (/^[^:]+:\/*[^/]*$/.test(base)) {
+                baseUrls[' ' + base] = base + '/';
+            } else {
+                baseUrls[' ' + base] = rtrim(base, '/', true);
+            }
+        }
+        base = baseUrls[' ' + base];
+
+        if (href.slice(0, 2) === '//') {
+            return base.replace(/:[\s\S]*/, ':') + href;
+        } else if (href.charAt(0) === '/') {
+            return base.replace(/(:\/*[^/]*)[\s\S]*/, '$1') + href;
+        } else {
+            return base + href;
+        }
+    }
+    var baseUrls = {};
+    var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
+
+    function noop() {}
+    noop.exec = noop;
+
+    function merge(obj) {
+        var i = 1,
+            target,
+            key;
+
+        for (; i < arguments.length; i++) {
+            target = arguments[i];
+            for (key in target) {
+                if (Object.prototype.hasOwnProperty.call(target, key)) {
+                    obj[key] = target[key];
+                }
+            }
+        }
+
+        return obj;
+    }
+
+    function splitCells(tableRow, count) {
+        // ensure that every cell-delimiting pipe has a space
+        // before it to distinguish it from an escaped pipe
+        var row = tableRow.replace(/\|/g, function (match, offset, str) {
+                var escaped = false,
+                    curr = offset;
+                while (--curr >= 0 && str[curr] === '\\') escaped = !escaped;
+                if (escaped) {
+                    // odd number of slashes means | is escaped
+                    // so we leave it alone
+                    return '|';
+                } else {
+                    // add space before unescaped |
+                    return ' |';
+                }
+            }),
+            cells = row.split(/ \|/),
+            i = 0;
+
+        if (cells.length > count) {
+            cells.splice(count);
+        } else {
+            while (cells.length < count) cells.push('');
+        }
+
+        for (; i < cells.length; i++) {
+            // leading or trailing whitespace is ignored per the gfm spec
+            cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+        }
+        return cells;
+    }
+
+// Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+// /c*$/ is vulnerable to REDOS.
+// invert: Remove suffix of non-c chars instead. Default falsey.
+    function rtrim(str, c, invert) {
+        if (str.length === 0) {
+            return '';
+        }
+
+        // Length of suffix matching the invert condition.
+        var suffLen = 0;
+
+        // Step left until we fail to match the invert condition.
+        while (suffLen < str.length) {
+            var currChar = str.charAt(str.length - suffLen - 1);
+            if (currChar === c && !invert) {
+                suffLen++;
+            } else if (currChar !== c && invert) {
+                suffLen++;
+            } else {
+                break;
+            }
+        }
+
+        return str.substr(0, str.length - suffLen);
+    }
+
+    /**
+     * Marked
+     */
+
+    function marked(src, opt, callback) {
+        // throw error in case of non string input
+        if (typeof src === 'undefined' || src === null) {
+            throw new Error('marked(): input parameter is undefined or null');
+        }
+        if (typeof src !== 'string') {
+            throw new Error('marked(): input parameter is of type '
+                + Object.prototype.toString.call(src) + ', string expected');
+        }
+
+        if (callback || typeof opt === 'function') {
+            if (!callback) {
+                callback = opt;
+                opt = null;
+            }
+
+            opt = merge({}, marked.defaults, opt || {});
+
+            var highlight = opt.highlight,
+                tokens,
+                pending,
+                i = 0;
+
+            try {
+                tokens = Lexer.lex(src, opt)
+            } catch (e) {
+                return callback(e);
+            }
+
+            pending = tokens.length;
+
+            var done = function(err) {
+                if (err) {
+                    opt.highlight = highlight;
+                    return callback(err);
+                }
+
+                var out;
+
+                try {
+                    out = Parser.parse(tokens, opt);
+                } catch (e) {
+                    err = e;
+                }
+
+                opt.highlight = highlight;
+
+                return err
+                    ? callback(err)
+                    : callback(null, out);
+            };
+
+            if (!highlight || highlight.length < 3) {
+                return done();
+            }
+
+            delete opt.highlight;
+
+            if (!pending) return done();
+
+            for (; i < tokens.length; i++) {
+                (function(token) {
+                    if (token.type !== 'code') {
+                        return --pending || done();
+                    }
+                    return highlight(token.text, token.lang, function(err, code) {
+                        if (err) return done(err);
+                        if (code == null || code === token.text) {
+                            return --pending || done();
+                        }
+                        token.text = code;
+                        token.escaped = true;
+                        --pending || done();
+                    });
+                })(tokens[i]);
+            }
+
+            return;
+        }
+        try {
+            if (opt) opt = merge({}, marked.defaults, opt);
+            return Parser.parse(Lexer.lex(src, opt), opt);
+        } catch (e) {
+            e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+            if ((opt || marked.defaults).silent) {
+                return '<p>An error occurred:</p><pre>'
+                    + escape(e.message + '', true)
+                    + '</pre>';
+            }
+            throw e;
+        }
+    }
+
+    /**
+     * Options
+     */
+
+    marked.options =
+        marked.setOptions = function(opt) {
+            merge(marked.defaults, opt);
+            return marked;
+        };
+
+    marked.getDefaults = function () {
+        return {
+            baseUrl: null,
+            breaks: false,
+            gfm: true,
+            headerIds: true,
+            headerPrefix: '',
+            highlight: null,
+            langPrefix: 'language-',
+            mangle: true,
+            pedantic: false,
+            renderer: new Renderer(),
+            sanitize: false,
+            sanitizer: null,
+            silent: false,
+            smartLists: false,
+            smartypants: false,
+            tables: true,
+            xhtml: false
+        };
+    }
+
+    marked.defaults = marked.getDefaults();
+
+    /**
+     * Expose
+     */
+
+    marked.Parser = Parser;
+    marked.parser = Parser.parse;
+
+    marked.Renderer = Renderer;
+    marked.TextRenderer = TextRenderer;
+
+    marked.Lexer = Lexer;
+    marked.lexer = Lexer.lex;
+
+    marked.InlineLexer = InlineLexer;
+    marked.inlineLexer = InlineLexer.output;
+
+    marked.parse = marked;
+
+    if (typeof module !== 'undefined' && typeof exports === 'object') {
+        module.exports = marked;
+    } else if (typeof define === 'function' && define.amd) {
+        define(function() { return marked; });
+    } else {
+        root.marked = marked;
+    }
+})(this || (typeof window !== 'undefined' ? window : global));