First support for md extensions; Package all needed dependencies in the repo

Source/node_modules/longest/index.js

@@ -0,0 +1,37 @@
+/*!
+ * longest <https://github.com/jonschlinkert/longest>
+ *
+ * Copyright (c) 2014-2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function(arr) {
+  if (!arr) {
+    return null;
+  }
+
+  var len = arr.length;
+  if (!len) {
+    return null;
+  }
+
+  var c = 0;
+  var i = 0;
+  var ele;
+  var elen;
+  var res;
+
+  for (; i < len; i++) {
+    ele = arr[i].toString();
+    elen = ele.length;
+
+    if (elen > c) {
+      res = ele;
+      c = elen;
+    }
+  }
+
+  return res;
+};