Add relationship model and tests for following users:
Relationship working, tests for relationship pending
Add user tests
Add reverse_relationship to User.rb to allow searching by followers
Add hash for vote type, update seeds file to reflect new way of creating votes
Comment out @user declaration in controller since current_user is null
Almost ready for MVP, login working again, user feed upon login, show 'new workout' form on user feed, view other users and their followers
Slight changes to views
Add 'Nick Smith is awesome' to seeds.rb