Updated with Swift 2.0
Credits: CezaryKopacz (https://github.com/CezaryKopacz/CKWaveCollectionViewTransition) for the wave transition class
vinit5320/SwiftyCollectionView
Guide: https://swiftyos.wordpress.com/2015/08/01/animated-wave-transition-collectionview-ckwavecollectionviewtransition
Swift