Subclass of iOS Cocoa Touch UINavigationController, which enables push and pop animation with "door" effect.
Available customizations:
- duration of animation (property animationDuration)
- side (left/right/top/bottom, see enum LPDoorSide)
Copy LPDoorStyleNavigationController.h and LPDoorStyleNavigationController.m into your project and use it like regular UINavigationController.
