Make sure to return a value
If a request can be cached, feed from the persistent store
implemented showStoriesAs.... so you can't switch between grid and list while more stories are loading on category view
Merge branch 'refs/heads/3.6/news-data-source' into 3.6/ipad-news-update-stories
Categories are now retrieved from core data if device is offline.  When device is offline cached stories appear.