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
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