Guide and Category Search

This pull implements search throughout the app.  Finally.

RIght now we just have search for categories (Topics, devices, whateverwecallthem) and guides. There is a search item in the menu drawer which takes you to the default search activity and allows you to perform a search there.   Also, in TopicActivity and TopicViewActivity, there are search icons in the action bar.

These changes are deployed to both beta groups.