Add decoratedText prop to DecoratorComponent
Add decoratedText prop to DecoratorComponent

Summary:Resolves #140 and #68.

Tested with `console.log(this.props.decoratedText)` in render method of TokenSpan in entity.html.
Closes https://github.com/facebook/draft-js/pull/144

Reviewed By: ezequiel

Differential Revision: D3002917

fb-gh-sync-id: 2451c82c74c0835217edcc7923c4430ae5ae3969
shipit-source-id: 2451c82c74c0835217edcc7923c4430ae5ae3969

brookslyrette/draft-js,johnmpotter/draft-js,johnmpotter/draft-js,TripleDip/draft-js,davidchang/draft-js,facebook/draft-js,dirkholsopple/draft-js,tonygentilcore/draft-js,TripleDip/draft-js,brookslyrette/draft-js,dirkholsopple/draft-js,SciMts/draft-js,davidchang/draft-js,tonygentilcore/draft-js,SciMts/draft-js