Introduce blog

Summary:Ported the infrastructure from jest.

![screen shot 2016-03-24 at 9 47 50 am](https://cloud.githubusercontent.com/assets/197597/14024237/85db1132-f1a5-11e5-84be-f525e302c6ca.png)
Closes https://github.com/facebook/react-native/pull/6629

Differential Revision: D3094423

Pulled By: vjeux

fb-gh-sync-id: a01aec6a55d28484c45bb241d037ca6717bc5e81
shipit-source-id: a01aec6a55d28484c45bb241d037ca6717bc5e81

website/core/BlogSidebar.js

@@ -0,0 +1,42 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @providesModule BlogSidebar
+ */
+
+'use strict';
+
+var MetadataBlog = require('MetadataBlog');
+var React = require('React');
+
+var BlogSidebar = React.createClass({
+  render: function() {
+    return (
+      <div className="nav-docs">
+        <div className="nav-docs-section">
+          <h3>Recent Posts</h3>
+          <ul>
+            {MetadataBlog.files.map(function(post) {
+              return (
+                <li key={post.path}>
+                  <a
+                    className={this.props.title === post.title ? 'active' : ''}
+                    href={'/react-native/blog/' + post.path}>
+                    {post.title}
+                  </a>
+                </li>
+              );
+            }.bind(this))}
+          </ul>
+        </div>
+      </div>
+    );
+  }
+});
+
+module.exports = BlogSidebar;