add react&webpack tutorial

README.md

@@ -457,6 +457,7 @@
     * [React webpack-cookbook](https://github.com/fakefish/react-webpack-cookbook)
     * [React 入门教程](http://fraserxu.me/intro-to-react/)
     * [React Native 中文文档(含最新Android内容)](http://wiki.jikexueyuan.com/project/react-native/)
+    * [Learn React & Webpack by building the Hacker News front page](https://github.com/theJian/build-a-hn-front-page)
 * impress.js
     * [impress.js的中文教程](https://github.com/kokdemo/impress.js-tutorial-in-Chinese)
 * CoffeeScript