Subreddit Suggest

For @chromakode

Adds subreddit suggest to multi add field, subreddit search, search, and add subreddit.  This version includes fixes for the advanced search dropdown (along with rebasing and bug fixing).  This pull req was (very) rebased and fixed up, so keeping the new changes on top of the old ones was mostly pointless and far more confusing.

![http://i.imgur.com/0dYrQh0.png]()

![http://i.imgur.com/HjSaGgk.png]()

![http://i.imgur.com/01SxeNl.png]()

![http://i.imgur.com/nird61T.png]()