Merge pull request #39 from ospreys-2014/model_migration

review tests
saving old version
removed old kendrick folder and files
Update README.md
add login
removing the old Kendrick subfolder
fixed checkout box on signup and add login
Merge pull request #40 from ospreys-2014/user_branch

fixed checkout box on signup and add login
Fixes layout
login works
Merge pull request #41 from ospreys-2014/user_branch

login works
Merge pull request #42 from ospreys-2014/artists_genres

Fixes layout
allow nil for soundcloud
update reviews model and tests
add comment model and migration
review rspec tests