Modified React 0.14.0 tutorial working with TypeScript 1.6.2

This is a quick and dirty rewrite of parts of the React Tutorial that works with TypeScript 1.6. I've only implemented the client-side portions, and a few minor things have been renamed. This is intended as a sample when working through the tutorial, rather than a replacement for the tutorial.

This is my first encounter with React, so I make no claims that I've found the best implementation, only that it works for me. Many of the issues I encountered are likely to go away within a matter of months.

The interesting file is scripts/example.tsx, which compiles to scripts/example.js.

1. WebStorm 11 EAP (my IDE) and/or TypeScript doesn't know that React has split out ReactDOM, so ReactDOM is not used. This results in deprecation warnings.
2. React has two styles for creating components, React.createClass and subclassing Component. The tutorial does the former, TypeScript needs the latter.
3. Because of scope issues with this, you can't call object methods directly from JSX, e.g.: <CommentForm onCommentSubmit={addComment} />, you need to wrap methods in a closure, i.e.: <CommentForm onCommentSubmit={(comment) => this.addComment(comment)} />