Checkpoint, partway through conversion to UICollectionView. So much code will need to change, evaluating whether it's better to start with a brand new set of controllers.
Get rid of IPSetGridViewController.xib
Get rid of IPPortfolioGridViewController.xib
Kill IPGridHeader
Fix bug where I kept generating new labels and images for cells
Code cleanup
Fix rotation and edge insets
Switch IPSetPagingViewController to UICollectionView. Rotation doesn't work yet :-(
Kill BDPagingView