Initial Commit
feat:creat a UICollectionViewController named BHCollectionViewController
feat:create a UICollectionViewLayout named BHPhotoAlbumLayout
feat:create a UICollectionViewCell named BHAlbumPhotoCell
fix:setup the BHPhotoAlbumLayout
fix(layout):override prepareLayout
fix(layout):override layoutAttributesForElementsInRect
fix(layout):override layoutAttributesForItemAtIndexPath
fix(layout):override collectionViewContentSize
fix:change the main interfacer of this project
Merge branch 'master' of https://github.com/morisunshine/DemoOfUICollectionView