Fix nil @user bug on login with wrong credentials. Add favicon and logo.
Add tests for user model (orders placed and received). Remove username presence validation.
Pass new user model specs.
Add user model tests for validations on presence and uniqueness of username.
Update seeds to use placed_orders user method.
Fix user model spec for validating uniqueness of username. Pass user validation tests.
User email from facebook oauth as username, with a suffix on collision.
Fix typo bug in users controller.