Added gathering cards in a pile via pinch gesture and using pan gesture to moved the stack (pile) of cards. When any of the cards are tapped the cards go back to their original position with animation.

Played around with multiple ways to animate
 - Used UIDynamicAnimator and pan gesture effectively for moving the pile of cards
 - But for the gathering of cards the dynamic option via PushBehavior and Collision behavior did not work that well