React 0.13 support?

[pedroteixeira]

Currently, there are a few warnings:

Warning: owner-based and parent-based contexts differ (values: [object Object]vs[object Object]) for key (layoutContext) while mounting Layout
(see: http://fb.me/react-context-by-parent)

[jsdf]

This shouldn't really create a problem, in fact this module simulates parent-based context by injecting the layoutContext prop into children. Once owner-based context is a thing of the past then some code can actually be deleted.