refactoring
Merge branch 'MK_update' of https://github.com/SMCorpporation/SMDataDiller
Merge pull request #3 from SMCorporation/MK_update

modified baseDataProvider, add indexOfItem, initialize, setItems...
small changes
replace respondToSelector -> conformsToProtocol
Merge branch 'master' of github.com:SMCorpporation/SMDataDiller into mk_collectionView