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

Source/node_modules/babel-runtime/helpers/extends.js

@@ -0,0 +1,23 @@
+"use strict";
+
+exports.__esModule = true;
+
+var _assign = require("../core-js/object/assign");
+
+var _assign2 = _interopRequireDefault(_assign);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+exports.default = _assign2.default || function (target) {
+  for (var i = 1; i < arguments.length; i++) {
+    var source = arguments[i];
+
+    for (var key in source) {
+      if (Object.prototype.hasOwnProperty.call(source, key)) {
+        target[key] = source[key];
+      }
+    }
+  }
+
+  return target;
+};