redding/deas — pull request #79 by kellyredding (2013-05-31 22:32:37+00:00)
Title: update the view handler `layout` method to append layouts

This is a backwards incompatible change with the previous behavior.
Before, this method would _reset_ its value to the given layout set.

This allows plugins to append layouts onto the current set of layouts
without having knowledge of the current set.

@jcredding ready for review.