Beta Recommendations

-- You need to install django-taggit for these to work --
Modified channel submission page, removed old tag system and added
django taggit's tags for channels. Probably requires deleting database.
Still need to exclude unwanted recommendations (what you've subscribed
to, what is already on the recommendation list) when I figure out
queries. Rec section also needs to be formatted to the right. Please
yell at me if I forgot something.