Add collectionView header for Xcode 4.4
Add collectionView header for Xcode 4.4
Kevin775263419/PSTCollectionView,godLoveLucifer/PSTCollectionView,StephaneDelcroix/PSTCollectionView,niuxinghua/PSTCollectionView,Anish-kumar-dev/PSTCollectionView,thevuuranusls/PSTCollectionView,zjh171/PSTCollectionView,jianwoo/PSTCollectionView,CorzFree/PSTCollectionView,zace-yuan/PSTCollectionView,steipete/PSTCollectionView,StephaneDelcroix/PSTCollectionView,ba01ei/PSTImprovedCollectionView,Amnysia/PSTCollectionView