Translate README to English

* Move Chinese version of README to README_cn.md.

* Add hyperlink to jump between both versions.

README.md

@@ -1,36 +1,41 @@
-WeUI 为微信 Web 服务量身设计  
+WeUI - tailor-made for WeChat web service
 ====
 
 [![Build Status](https://travis-ci.org/weui/weui.svg?branch=master)](https://travis-ci.org/weui/weui)
 [![npm version](https://img.shields.io/npm/v/weui.svg)](https://www.npmjs.org/package/weui)
 [![Gitter](https://badges.gitter.im/weui/weui.svg)](https://gitter.im/weui/weui?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
-## 概述
+[中文版本](README_cn.md)
 
-WeUI 是一套同微信原生视觉体验一致的基础样式库，由微信官方设计团队为微信 Web 开发量身设计，可以令用户的使用感知更加统一。包含`button`、`cell`、`dialog`、 `progress`、 `toast`、`article`、`actionsheet`、`icon`等各式元素。
+## Introduction
 
-## 手机预览
+WeUI is an WeChat-like UI framework officially designed by the WeChat Design Team, tailor-made for WeChat Web development, in order to improve and standardize the experience for WeChat users. Including components such as `button`、`cell`、`dialog`、 `progress`、 `toast`、`article`、`actionsheet`、`icon`.
+
+## Mobile demo
 
 ![https://weui.io](https://cloud.githubusercontent.com/assets/4652816/15662614/178efd46-2725-11e6-8952-09d7836e968d.png)
 
 [https://weui.io](https://weui.io)
 
-老版本: [https://weui.io/0.4.x](https://weui.io/0.4.x)
+Legacy version: [https://weui.io/0.4.x](https://weui.io/0.4.x)
+
+## Documentations
 
-## 文档
-- WeUI 说明文档参考 [Wiki](https://github.com/weui/weui/wiki)
-- WeUI 视觉标准参考 [weui-design](https://github.com/weui/weui-design)
+- WeUI documentation [Wiki](https://github.com/weui/weui/wiki)
+- WeUI design reference [weui-design](https://github.com/weui/weui-design)
+
+## Development
 
-## 扩展
 - [WeUI for 小程序 (weui-wxss)](https://github.com/weui/weui-wxss/)
 - [weui.js](https://github.com/weui/weui.js/)
 - [react-weui](https://github.com/weui/react-weui/)
 
 ## License
+
 The MIT License(http://opensource.org/licenses/MIT)
 
-请自由地享受和参与开源
+Please feel free to use and contribute to the development.
 
-## 贡献
+## Contribution
 
-如果你有好的意见或建议，欢迎给我们提issue或pull request，为提升微信web体验贡献力量
+If you have any ideas or suggestions to improve Wechat WeUI, welcome to submit an issue/pull request.

README_cn.md

@@ -0,0 +1,38 @@
+WeUI 为微信 Web 服务量身设计
+====
+
+[![Build Status](https://travis-ci.org/weui/weui.svg?branch=master)](https://travis-ci.org/weui/weui)
+[![npm version](https://img.shields.io/npm/v/weui.svg)](https://www.npmjs.org/package/weui)
+[![Gitter](https://badges.gitter.im/weui/weui.svg)](https://gitter.im/weui/weui?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
+[English version](README.md)
+
+## 概述
+
+WeUI 是一套同微信原生视觉体验一致的基础样式库，由微信官方设计团队为微信 Web 开发量身设计，可以令用户的使用感知更加统一。包含`button`、`cell`、`dialog`、 `progress`、 `toast`、`article`、`actionsheet`、`icon`等各式元素。
+
+## 手机预览
+
+![https://weui.io](https://cloud.githubusercontent.com/assets/4652816/15662614/178efd46-2725-11e6-8952-09d7836e968d.png)
+
+[https://weui.io](https://weui.io)
+
+老版本: [https://weui.io/0.4.x](https://weui.io/0.4.x)
+
+## 文档
+- WeUI 说明文档参考 [Wiki](https://github.com/weui/weui/wiki)
+- WeUI 视觉标准参考 [weui-design](https://github.com/weui/weui-design)
+
+## 扩展
+- [WeUI for 小程序 (weui-wxss)](https://github.com/weui/weui-wxss/)
+- [weui.js](https://github.com/weui/weui.js/)
+- [react-weui](https://github.com/weui/react-weui/)
+
+## License
+The MIT License(http://opensource.org/licenses/MIT)
+
+请自由地享受和参与开源
+
+## 贡献
+
+如果你有好的意见或建议，欢迎给我们提issue或pull request，为提升微信web体验贡献力量