Component.prototype.invokeWithCallback handles the correct signature

It now returns a promise.

It handles its arguments the same way invokeWithCallbacks does internally and passes them gracefully
Merge pull request #316 from xcambar/hotfix/invoke_with_callback_on_component

Component.prototype.invokeWithCallback handles the correct signature
Adding CHANGELOG
Bumping version to v0.9.2
ie8 fixes
Fixed some typos in comments
Added module to globals
Whitespace
Announcing our plans for the future of the project.

As discussed in person at DotJS in Paris, I've added a section with our plans for how to evolve Aura. I'd appreciate any input/improvements that can be made here :)
Simplify an example
Merge pull request #327 from dcherman/docs

Simplify an example