Introducing React Elements

The upcoming React 0.12 tweaks some APIs to get us close to the final 1.0 API. This release is all about setting us up for making the ReactElement type really FAST, jest unit testing easier, making classes simpler (in preparation for ES6 classes) and better integration with third-party languages! If you currently use JSX everywhere, you don't really have to do anything to get these benefits! The updated transformer will do it for you.