Fixes view reusing after animations
Added PSTCollectionElementCategory and exposed layoutAttributesForSupplementaryViewOfKind:atIndexPath: for subclassing layouts
Implement Decoration views
Reuse decoration views after animation
Merge pull request #250 from kgn/master

PSTCollectionElementCategory and layout subclassing
Merge pull request #252 from cysp/for-review/decoration-views

Implement Decoration views
Revert commits related to delegate setting

This reverts the following commits:
- efc4f9948db0a89435627bde32d2232efc04d020 (modify delegate setting)
- bca811fc9618236c937d3945834d81201a7080ed (comment on the modification
that was made)
Merge pull request #253 from sibljon/master

Revert delegate setting related commits
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:…
Merge branch 'master' of https://github.com/steipete/PSTCollectionView
Add delete button
Add sectioned data source