diff --git a/docs/assets/js/docify.js b/docs/assets/js/docify.js
index a1e2708a..c03506a9 100644
--- a/docs/assets/js/docify.js
+++ b/docs/assets/js/docify.js
@@ -465,11 +465,10 @@
    * Render progress bar
    */
   function progressbar (ref) {
-    barE2.style.display = "block";
+
     var loaded = ref.loaded;
     var total = ref.total;
     var step = ref.step;
-  
     var num;
   
     !barEl && init();
@@ -480,7 +479,7 @@
     } else {
       num = Math.floor(loaded / total * 100);
     }
-  
+    barE2.style.display = "block";
     barEl.style.opacity = 1;
     barEl.style.width = num >= 95 ? '100%' : num + '%';
     if (num == Infinity) {
diff --git a/docs/assets/js/docify.min.js b/docs/assets/js/docify.min.js
index 9ad59cd4..9da8fb3e 100644
--- a/docs/assets/js/docify.min.js
+++ b/docs/assets/js/docify.min.js
@@ -1,5 +1,5 @@
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*/?>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)"+"|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)"+")",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).getRegex();block.blockquote=edit(block.blockquote).replace("paragraph",block.paragraph).getRegex();block.normal=merge({},block);block.gfm=merge({},block.normal,{fences:/^ *(`{3,}|~{3,})[ \.]*(\S+)? 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 }}if(cap=this$1.rules.code.exec(src)){src=src.substring(cap[0].length);cap=cap[0].replace(/^ {4}/gm,"");this$1.tokens.push({type:"code",text:!this$1.options.pedantic?rtrim(cap,"\n"):cap});continue}if(cap=this$1.rules.fences.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:"code",lang:cap[2],text:cap[3]||""});continue}if(cap=this$1.rules.heading.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:"heading",depth:cap[1].length,text:cap[2]});continue}if(top&&(cap=this$1.rules.nptable.exec(src))){item={type:"table",header:splitCells(cap[1].replace(/^ *| *\| *$/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$1.tokens.push(item);continue}}if(cap=this$1.rules.hr.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:"hr"});continue}if(cap=this$1.rules.blockquote.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:"blockquote_start"});cap=cap[0].replace(/^ *> ?/gm,"");this$1.token(cap,top);this$1.tokens.push({type:"blockquote_end"});continue}if(cap=this$1.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$1.tokens.push(listStart);cap=cap[0].match(this$1.rules.item);listItems=[];next=false;l=cap.length;i=0;for(;i<l;i++){item=cap[i];space=item.length;item=item.replace(/^ *([*+-]|\d+\.) +/,"");if(~item.indexOf("\n ")){space-=item.length;item=!this$1.options.pedantic?item.replace(new RegExp("^ {1,"+space+"}","gm"),""):item.replace(/^ {1,4}/gm,"")}if(this$1.options.smartLists&&i!==l-1){b=block.bullet.exec(cap[i+1])[0];if(bull!==b&&!(bull.length>1&&b.length>1)){src=cap.slice(i+1).join("\n")+src;i=l-1}}loose=next||/\n\n(?!\s*$)/.test(item);if(i!==l-1){next=item.charAt(item.length-1)==="\n";if(!loose){loose=next}}if(loose){listStart.loose=true}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$1.tokens.push(t);this$1.token(item,false);this$1.tokens.push({type:"list_item_end"})}if(listStart.loose){l=listItems.length;i=0;for(;i<l;i++){listItems[i].loose=true}}this$1.tokens.push({type:"list_end"});continue}if(cap=this$1.rules.html.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:this$1.options.sanitize?"paragraph":"html",pre:!this$1.options.sanitizer&&(cap[1]==="pre"||cap[1]==="script"||cap[1]==="style"),text:cap[0]});continue}if(top&&(cap=this$1.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$1.tokens.links[tag]){this$1.tokens.links[tag]={href:cap[2],title:cap[3]}}continue}if(top&&(cap=this$1.rules.table.exec(src))){item={type:"table",header:splitCells(cap[1].replace(/^ *| *\| *$/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$1.tokens.push(item);continue}}if(cap=this$1.rules.lheading.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:"heading",depth:cap[2]==="="?1:2,text:cap[1]});continue}if(top&&(cap=this$1.rules.paragraph.exec(src))){src=src.substring(cap[0].length);this$1.tokens.push({type:"paragraph",text:cap[1].charAt(cap[1].length-1)==="\n"?cap[1].slice(0,-1):cap[1]});continue}if(cap=this$1.rules.text.exec(src)){src=src.substring(cap[0].length);this$1.tokens.push({type:"text",text:cap[0]});continue}if(src){throw new Error("Infinite loop on byte: "+src.charCodeAt(0))}}return this.tokens};var inline={escape:/^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,autolink:/^<(scheme:[^\s\x00-\x1f<>]*|email)>/,url:noop,tag:"^comment"+"|^</[a-zA-Z][\\w:-]*\\s*>"+"|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>"+"|^<\\?[\\s\\S]*?\\?>"+"|^<![a-zA-Z]+\\s[\\s\\S]*?>"+"|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>",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();inline.normal=merge({},inline);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()});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();inline.breaks=merge({},inline.gfm,{br:edit(inline.br).replace("{2,}","*").getRegex(),text:edit(inline.gfm.text).replace("{2,}","*").getRegex()});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}}}}InlineLexer.rules=inline;InlineLexer.output=function(src,links,options){var inline=new InlineLexer(links,options);return inline.output(src)};InlineLexer.prototype.output=function(src){var this$1=this;var out="",link,text,href,title,cap,prevCapZero;while(src){if(cap=this$1.rules.escape.exec(src)){src=src.substring(cap[0].length);out+=cap[1];continue}if(cap=this$1.rules.autolink.exec(src)){src=src.substring(cap[0].length);if(cap[2]==="@"){text=escape(this$1.mangle(cap[1]));href="mailto:"+text}else{text=escape(cap[1]);href=text}out+=this$1.renderer.link(href,null,text);continue}if(!this$1.inLink&&(cap=this$1.rules.url.exec(src))){if(cap[2]==="@"){text=escape(cap[0]);href="mailto:"+text}else{do{prevCapZero=cap[0];cap[0]=this$1.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$1.renderer.link(href,null,text);continue}if(cap=this$1.rules.tag.exec(src)){if(!this$1.inLink&&/^<a /i.test(cap[0])){this$1.inLink=true}else{if(this$1.inLink&&/^<\/a>/i.test(cap[0])){this$1.inLink=false}}if(!this$1.inRawBlock&&/^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])){this$1.inRawBlock=true}else{if(this$1.inRawBlock&&/^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])){this$1.inRawBlock=false}}src=src.substring(cap[0].length);out+=this$1.options.sanitize?this$1.options.sanitizer?this$1.options.sanitizer(cap[0]):escape(cap[0]):cap[0];continue}if(cap=this$1.rules.link.exec(src)){src=src.substring(cap[0].length);this$1.inLink=true;href=cap[2];if(this$1.options.pedantic){link=/^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);if(link){href=link[1];title=link[3]}else{title=""}}else{title=cap[3]?cap[3].slice(1,-1):""}href=href.trim().replace(/^<([\s\S]*)>$/,"$1");out+=this$1.outputLink(cap,{href:InlineLexer.escapes(href),title:InlineLexer.escapes(title)});this$1.inLink=false;continue}if((cap=this$1.rules.reflink.exec(src))||(cap=this$1.rules.nolink.exec(src))){src=src.substring(cap[0].length);link=(cap[2]||cap[1]).replace(/\s+/g," ");link=this$1.links[link.toLowerCase()];if(!link||!link.href){out+=cap[0].charAt(0);src=cap[0].substring(1)+src;continue}this$1.inLink=true;out+=this$1.outputLink(cap,link);this$1.inLink=false;continue}if(cap=this$1.rules.strong.exec(src)){src=src.substring(cap[0].length);out+=this$1.renderer.strong(this$1.output(cap[4]||cap[3]||cap[2]||cap[1]));continue}if(cap=this$1.rules.em.exec(src)){src=src.substring(cap[0].length);