[docs] Add a section about controllers in classes to usage doc
[docs] Inject $app to showcase that possibility
merged branch igorw/controllers-in-classes (PR #578)

This PR was merged into the master branch.

Commits
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2904a7a [docs] Inject $app to showcase that possibility
8ac1c04 [docs] Add a section about controllers in classes to usage doc

Discussion
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[docs] Add a section about controllers in classes to usage doc

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by ChrisRiddell at 2013-01-10T23:40:43Z

:+1: The little more information this gives is helpful :)