Add new ContentProvider delegate methods
Refactored ContentProvider delegate methods
add tests for new delegate methods call in CoreDataContentProvider
Do not notify delegate on state changed in previous state equal current state + tests. (DXTKCoreDataContentProvider)
DXTKCoreDataContentProvider #reload method refactoring
DXTKCoreDataContentProviderSpec refactoring
Add DXTKContentProvider implementation to datasources
Merge branch 'fetchResultsControllers'

Conflicts:
	DXTableKit.xcodeproj/project.pbxproj
	DXTableKit/Code/CollectionView/DXTKCollectionViewDataSource.h
	DXTableKit/Code/CollectionView/DXTKCollectionViewDataSource.m