user login works now
added vlaidations for email for user, fixed rspec tests that it broke
added an error if a user signs in incorrectly
added some validatione errors when users sign up or login
fixed spacing
enables all api reviews to be loaded under a single set of review tabs; to fix: comment toggle
Merge pull request #39 from mule-deer-2014/user_authentication

User authentication
Merge remote-tracking branch 'origin' into reviews_for_api_profile