jspahrsummers/GroceryList — pull request #14 by denis-mikhaylov (2013-12-24 05:19:28+00:00)
Title: Fulfill view controller containment contract

From Apple documentation:
addChildViewController: will call [child willMoveToParentViewController:self] before adding the
child. However, it will not call didMoveToParentViewController:. It is expected that a container view
controller subclass will make this call after a transition to the new child has completed or, in the
case of no transition, immediately after the call to addChildViewController:.