Improve rotation animation
Merge pull request #7 from bm-i/patch-1

Improve rotation animation
Update to be able to use Interface Builder to customize cell and layout.
Add sample configuration in iPad storyboard.
Merge pull request #8 from mystcolor/development/customizeUsingInterfaceBuilder

Update to be able to use Interface Builder to customize cell and layout.
Merge pull request #9 from mystcolor/development/customizeUsingInterfaceBuilderDemo

Development/customize using interface builder demo
Merge branch 'master' of https://github.com/chiahsien/UICollectionViewWaterfallLayout