Add a completion block parameter to RZSingleChildContainerViewController.
Move properties from continuation category to main @interface.
Add an isTransitioning property.
Raise an exception if an attempt is made to transition while a transition is already in flight.
Override childViewControllerForStatusBarHidden.
HeaderDoc ALL THE THINGS.
Apply RZStyleGuide, since I’m already touching many lines in these files anyway.
Forward calls to -supportedInterfaceOrientations.
Remove check for window, as it appears not to matter.
Do need window check for non-animated transition
Merge pull request #96 from Raizlabs/feature/zeveisenberg/completion-blocks-for-single-child-container-view-controller

Add a completion block parameter to RZSingleChildContainerViewController