Fix for incorrect loading layout from nib

Fixing issue described here:
https://github.com/steipete/PSTCollectionView/issues/157
Merge pull request #254 from fduch2k/master

Fix for incorrect loading layout from nib
Set the frame to be applied by its transform.
Merge pull request #263 from guykogus/master

Applied the transform to the collection view cell's frame
#255 fix and better supplementary views support in animations
Merge pull request #266 from gavrix/flowlayout_crash_fix

#255 fix and better supplementary views support in animations
Implement -layoutAttributesForDecorationViewOfKind:…
Merge pull request #268 from cysp/for-review/layoutattributesfordecorationview

Implement -layoutAttributesForDecorationViewOfKind:…
Make it so the grid layout no longer forces the rects to be integer aligned, this is closer to the native collection layout behaviour.
Merge pull request #271 from kurt-schaefer/master

Grid Layout Row Snapping Fix
fix a typo which prevents _moveItems being created
Merge pull request #272 from lono175/master

fix a typo which prevents _moveItems being created