Merge pull request reactjs#40 from zpao/0.13

Point at 0.13

Author: zpao

public/index.html

@@ -4,8 +4,8 @@
     <title>Hello React</title>
     <!-- Not present in the tutorial. Just for basic styling. -->
     <link rel="stylesheet" href="css/base.css" />
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.12.2/react.js"></script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.12.2/JSXTransformer.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.0/react.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.0/JSXTransformer.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/showdown/0.3.1/showdown.min.js"></script>
   </head>