Merge pull request #44 from ospreys-2014/artist_profile

Artist profile
allow blanks for soundcloud profile validation
Merge pull request #45 from ospreys-2014/model_migration

allow blanks for soundcloud profile validation
change redirect after login
fix redirect of home after login
made edits to user auth tests
Merge pull request #46 from ospreys-2014/user_branch

User branch
fix signup feature test
rspec test to allow blank soundcloud profile
rspec for reviews for invalid reviewer and artist
rspec test to validate many comments
rspec tests for comments
simplecov test coverage
Merge pull request #47 from ospreys-2014/model_migration

Model migration
artist can now select multiple genres they can assign themselves
dried up some things
hide category options to just artists
hide genre selection for artists
fix merge conflicts
Merge branch 'user_branch'