fix (doc): quick-start add CDN

document/components/docs/en-US/install.md

-## Install
-
-
-### NPM
-
-It is recommended to install `cube-ui` via npm.
-
-```shell
-$ npm install cube-ui
-```
-
-
-### CDN
-
-You can also import js and css files from unpkg.com with tags in html.
-
-```html
-<script src="https://unpkg.com/cube-ui/lib/cube.min.js"></script>
-<link rel="stylesheet" href="https://unpkg.com/cube-ui/lib/cube.min.css">
-```
-
-### Version log
-
-For update logs of each version, see [GitHub](https://github.com/didi/cube-ui/releases)

document/components/docs/en-US/quick-start.md

@@ -2,10 +2,17 @@
 
 ### Install
 
+NPM:
 ```shell
 $ npm install cube-ui --save
 ```
 
+Or CDN:
+```js
+<script src="https://unpkg.com/cube-ui/lib/cube.min.js"></script>
+<link rel="stylesheet" href="https://unpkg.com/cube-ui/lib/cube.min.css">
+```
+
 ### Usage
 
 It is recommended to use [babel-plugin-transform-modules](https://www.npmjs.com/package/babel-plugin-transform-modules),which helps you import component modules and corresponding styles more elegantly.

document/components/docs/zh-CN/install.md

-## 安装
-
-
-### NPM
-
-推荐使用 NPM 安装`cube-ui`
-
-```shell
-$ npm install cube-ui
-```
-
-
-### CDN
-
-也可通过 unpkg.com 获取资源，用标签引入 js 和 css 文件使用。
-
-```html
-<script src="https://unpkg.com/cube-ui/lib/cube.min.js"></script>
-<link rel="stylesheet" href="https://unpkg.com/cube-ui/lib/cube.min.css">
-```
-
-### 版本日志
-
-版本的更新日志见 [GitHub](https://github.com/didi/cube-ui/releases)

document/components/docs/zh-CN/quick-start.md

@@ -2,10 +2,18 @@
 
 ### 安装
 
+NPM:
 ```shell
 $ npm install cube-ui --save
 ```
 
+或者 CDN:
+
+```js
+<script src="https://unpkg.com/cube-ui/lib/cube.min.js"></script>
+<link rel="stylesheet" href="https://unpkg.com/cube-ui/lib/cube.min.css">
+```
+
 ### 使用
 
 推荐使用 [babel-plugin-transform-modules](https://www.npmjs.com/package/babel-plugin-transform-modules) 插件，可以更优雅引入组件模块以及对应的样式。