added relevence to article_tags, and all creations thereof; added user_tags migration, added user queries to get tag data
Merge pull request #19 from bobolinks-2014/User_Data

added relevance to article_tags, and all creations thereof; added user_t...
Merge branch 'master' of https://github.com/bobolinks-2014/FlipSide into frontend_ratings
pull in backend rating
quick frontend backend test