feat:1、修复无数据时报错的问题。

2、新增自定义代码着色格式
3、新增自动加载配置文件

static/editor.md/lib/highlight/languages/abnf.js

@@ -0,0 +1,75 @@
+/*
+Language: Augmented Backus-Naur Form
+Author: Alex McKibben <alex@nullscope.net>
+*/
+
+function(hljs) {
+    var regexes = {
+        ruleDeclaration: "^[a-zA-Z][a-zA-Z0-9-]*",
+        unexpectedChars: "[!@#$^&',?+~`|:]"
+    };
+
+    var keywords = [
+        "ALPHA",
+        "BIT",
+        "CHAR",
+        "CR",
+        "CRLF",
+        "CTL",
+        "DIGIT",
+        "DQUOTE",
+        "HEXDIG",
+        "HTAB",
+        "LF",
+        "LWSP",
+        "OCTET",
+        "SP",
+        "VCHAR",
+        "WSP"
+    ];
+
+    var commentMode = hljs.COMMENT(";", "$");
+
+    var terminalBinaryMode = {
+        className: "symbol",
+        begin: /%b[0-1]+(-[0-1]+|(\.[0-1]+)+){0,1}/
+    };
+
+    var terminalDecimalMode = {
+        className: "symbol",
+        begin: /%d[0-9]+(-[0-9]+|(\.[0-9]+)+){0,1}/
+    };
+
+    var terminalHexadecimalMode = {
+        className: "symbol",
+        begin: /%x[0-9A-F]+(-[0-9A-F]+|(\.[0-9A-F]+)+){0,1}/,
+    };
+
+    var caseSensitivityIndicatorMode = {
+        className: "symbol",
+        begin: /%[si]/
+    };
+
+    var ruleDeclarationMode = {
+        begin: regexes.ruleDeclaration + '\\s*=',
+        returnBegin: true,
+        end: /=/,
+        relevance: 0,
+        contains: [{className: "attribute", begin: regexes.ruleDeclaration}]
+    };
+
+    return {
+      illegal: regexes.unexpectedChars,
+      keywords: keywords.join(" "),
+      contains: [
+          ruleDeclarationMode,
+          commentMode,
+          terminalBinaryMode,
+          terminalDecimalMode,
+          terminalHexadecimalMode,
+          caseSensitivityIndicatorMode,
+          hljs.QUOTE_STRING_MODE,
+          hljs.NUMBER_MODE
+      ]
+    };
+}