added a sign_in_as helper method for testing
added reviews table to database, created review model & reviews controller
Passing tests on creating a review, updated routes, factory girl, controllers
changed rating to dropdown selection, passing tests
updated files in response to Adam's review comments
Merge branch 'master' into add-review-to-playlist

Conflicts:
	config/routes.rb
Merge pull request #5 from swatkns785/add-review-to-playlist

Add review to playlist