Add NG-ZORRO links

docs/spec/introduce.en-US.md

@@ -26,7 +26,7 @@ We supply a series of design principles, practical patterns and high quality des
 [React](http://facebook.github.io/react/) is used to encapsulate a library of Ant Design components. Any other version of frameworks to implement is also welcome.
 
 - [Ant Design of React](/docs/react/introduce) (official implementation)
-- <div class="outside-link internal"><a href="http://zorro.alibaba.net" target="_blank">Ant Design of Angular 2</a></div>
+- <div class="outside-link"><a href="http://ng.ant.design" target="_blank">NG-ZORRO - Ant Design of Angular</a></div>
 - <div class="outside-link"><a href="https://github.com/iview/iview/" target="_blank">iView (vue)</a></div>
 - <div class="outside-link"><a href="https://github.com/FE-Driver/vue-beauty" target="_blank">vue-beauty</a></div>
 - <div class="outside-link"><a href="https://github.com/aliqin/atui" target="_blank">ATUI (vue)</a></div>

docs/spec/introduce.zh-CN.md

@@ -26,7 +26,7 @@ Ant Design 是一个致力于提升『用户』和『设计者』使用体验的
 我们采用 [React](http://facebook.github.io/react/) 封装了一套 Ant Design 的组件库，也欢迎社区其他框架的实现版本。
 
 - [Ant Design of React](/docs/react/introduce)（官方实现）
-- <div class="outside-link internal"><a href="http://zorro.alibaba.net" target="_blank">Ant Design of Angular 2</a></div>
+- <div class="outside-link"><a href="http://ng.ant.design" target="_blank">NG-ZORRO - Ant Design of Angular</a></div>
 - <div class="outside-link"><a href="https://github.com/iview/iview/" target="_blank">iView (vue)</a></div>
 - <div class="outside-link"><a href="https://github.com/FE-Driver/vue-beauty" target="_blank">vue-beauty</a></div>
 - <div class="outside-link"><a href="https://github.com/aliqin/atui" target="_blank">ATUI (vue)</a></div>

site/theme/template/Layout/Footer.jsx

@@ -69,16 +69,16 @@ class Footer extends React.Component {
           </li>
           <li>
             <h2><Icon type="link" /> <FormattedMessage id="app.footer.links" /></h2>
-            <div>
-              <a href="https://design.alipay.com/">
-                <FormattedMessage id="app.footer.design-platform" />
-              </a>
-            </div>
             <div>
               <a href="http://mobile.ant.design">Ant Design Mobile</a>
               <span> - </span>
               <FormattedMessage id="app.footer.mobile" />
             </div>
+            <div>
+              <a href="http://ng.ant.design">NG-ZORRO</a>
+              <span> - </span>
+              Ant Design of Angular
+            </div>
             <div>
               <a href="http://scaffold.ant.design">Scaffolds</a>
               <span> - </span>