Editor now gracefully handles ctrl +m
Editor now gracefully handles ctrl +m

Summary:When `ctrl + m` is pressed the block is split.

Closes #218
Closes https://github.com/facebook/draft-js/pull/235

Reviewed By: spicyj

Differential Revision: D3104393

fb-gh-sync-id: 8d8ecaae4a376fdfa5eb8938ad003752e30cd279
fbshipit-source-id: 8d8ecaae4a376fdfa5eb8938ad003752e30cd279

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