fix unsafe package (#447)

* fix unsafe package

* upgrade node version

* 调整 babel 使用姿势

* fix demo2 unsafe

Author: winddies

test/demo2/index.html

@@ -50,6 +50,6 @@
 </style>
 <script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js"></script>
 <script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
-<script type="text/javascript" src='/dist/boundle.js'></script>
+<script type="text/javascript" src='/webpack/boundle.js'></script>
 
-</html>
+</html>