Start to add a simpler and more reliable API for iOS7+
Set deployment target to iOS 7
Fix transition when popping
Introduce a new UIViewController subclass for convenience
Fix memory leak
Update test view controller to demonstrate the new API usage
Remove trailing whitespaces
Fix 3D effect
Merge branch 'modern'

Conflicts:
	TransitionDemo/Classes/ALTransitionTestViewController.m
Change deployment target
Use ADTransitionController if iOS version <= 6 and UINavigationController if iOS version >= 7
Remove deprecated methods warnings
Different appearance between iOS 6 and 7
Coding style
Fix bug with navigationBar. Reset views in a correct state after animation.
Fix bug with frames during 3D animations on iOS7
Change README for iOS7
Fix imports
Detailed README for iOS7 version
Changelog