Expose collectionList setter on Data Sources.
Commenting and assertion re: mutable list property
Merge branch 'develop' into feature/ndonald2/mutable-list-property

Conflicts:
	RZCollectionList/Classes/RZCollectionListCollectionViewDataSource.h
	RZCollectionList/Classes/RZCollectionListTableViewDataSource.h
Fix formatting warnings
Fix analyzer warning
Merge pull request #44 from Raizlabs/feature/ndonald2/mutable-list-property

Make collection list property settable