WIP
Call a delegate method when the size of the collection view is about to change. Since the finalize is wrapped in an animation block, this allows us to perform animations simultaneously with the collection view.
Merge branch 'feature/SaveEntryCellTextNotAPointerToTheCell' into feature/FixAnimations

Conflicts:
	MBContactPicker/ContactCollectionView.m
Remove unused property
Rename ContactFlowLayout’s protocol to match the class name
Use the collection view’s delegate as the delegate for our custom protocol
Fix type in protocol name and move protocol conformance to the implementation file
Revert flow layout delegate protocol name to UICollectionViewDelegateContactFlowLayout
Merge pull request #28 from Citrrus/feature/FixAnimations

Feature/fix animations