Fixed problem with applied LayoutAttributes

Had a problem with the SupplementaryView that is applied at dequeue time.
The SupplementaryView is not appearing at the first page and after scrolling it appears at the third page. When i'm using iOS 6 it works properly.

I reverted the changes in the methods `dequeueReusableSupplementaryViewOfKind:withReuseId:` and `createPreparedSupplementaryViewForElementOfKind:` to fix the problem.