Using iOS5 childViewControllers …

Now, event relay methods are useless. UIKit handle it :)
Merge pull request #44 from Onejjy/master

Implementation of iOS5 childViewControllers
Adding enablePopOverlapedViewOnTap feature

Adding enablePopOverlapedViewOnTap to PSStackedViewController.

When true, overlaped views (with overlap ratio under
kPSSVOverlapMinimalValueToApplyDarkRatio) do not accept touches from
user. But, when view is tapped (via UITapGestureRecognizer), the stack
is poped to this viewController.
Container height bugfix

Sometimes, PSStackedViewController do not set the good height to a
pushed viewController … Fixed.
PSSVContainerView transparentView bugfix

Sometimes, PSSVContainerView transparentView frame is not right (it do
not take the full ContainerView bounds). Fixed.
Merge pull request #45 from Onejjy/master

Bugfixes and a new feature
Fixed UINavigationController swizzling 

If PSStackedViewController was created more than once, the swizzling was 
reverted every two creations.
Merge pull request #46 from jeanregisser/fix_navigation_controller_swizzling

Fixed UIViewController.navigationController swizzling
merged new version from origin; fixed bug with touches