Fix highlighting behavior and reorganize how selection and highlighting iteract
fix incompatible pointer type warning for Deployment Targets >= iOS 6.0
Merge pull request #169 from mikevoyt/fixwarnings

fix incompatible pointer type warning for Deployment Targets >= iOS 6.0
Merge pull request #166 from taiyangc/highlight

Fix highlighting behavior and reorganize how selection and highlighting ...
Update header
Added invalidateLayout implementation for PSTCollectionViewLayout.m
Merge pull request #176 from r618/master

Added invalidateLayout implementation for PSTCollectionViewLayout