Switching to PG, cleaning factories and annotating, generating Genres
Adding user_factory, secondary factories and finished album specs
Adding Artist and Song tests
Adding Artist and Song tests
Adding Genre testing for validation and song-having, as well as songs ability to belong to Genre
Adding controllers for models (not fleshing out UsersController just yet)
Merge pull request #1 from doshea/master

Fleshing out model testing, upgrading Gemfile (PG WARNING), fixing factories