Moving React 0.13 to be the default

React 0.13 is now released so it should be the default type definition.
http://facebook.github.io/react/blog/2015/03/10/react-v0.13.html

react-router/react-router.d.ts

@@ -3,7 +3,7 @@
 // Definitions by: Yuichi Murata <https://github.com/mrk21>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-///<reference path='../react/react.d.ts' />
+///<reference path='../react/legacy/react-0.12.d.ts' />
 
 declare module ReactRouter {
     //