Inserting cells without initialLayoutAttrs bugfix

(now using regular layoutAttrs with fade-in using alpha)
Merge pull request #164 from gavrix/bugfix

Inserting cells without initialLayoutAttrs bugfix
Added the UIView designated initializer
Merge pull request #165 from smule/master

Override the UIView designated initializer in PSTCollectionView
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
Merge git://github.com/steipete/PSTCollectionView