Fixed cell highlighting inconsistences with iOS6, including the order and number of calls
Modified SelectionDelegateExample for better highlighting/selection debugging (in the future)
Add shouldDeselectItemAtIndexPath delegate check; update SelectionDelegateExample accordingly
Merge branch 'master' into fix_highlight
Fix highlighting behavior when touches move; cells should unhighlight immediately when scrolling happens
Fixed crash where the array oldToNewIndexMap was accessed with oldGlobalIndex, a huge number that is out of range.
Merge pull request #181 from taiyangc/fix_highlight

Fix highlight
Merge pull request #180 from neoneye/master

Fixed crash in [PSTCollectionView updateWithItems:] oldToNewIndexMap