AshFurrow/ARCollectionViewMasonryLayout — pull request #17 by 1aurabrown (2014-06-26 20:20:10+00:00)
Title: @ashfurrow => support for returning layout attributes for header and footer

Here I did what we talked about. header and footer attributes are calculated if necessary and stored. they are can then be included when determining which attributes to return for `layoutAttributesForElementsInRect` and `layoutAttributesForSupplementaryViewOfKind`.