Create Relationship model
Add active_relationship for follower
Add belongs_to relationship with follower and followed
Test relationship validation and follower_id and followed_id presence required
Empty fixture because default code violates the uniqueness constraint
Add presence validation for follower_id and followed_id
Add following relationships
Test for follow and unfollow
Create methods follow, unfollow and following?
Add passive_relationships and followers
Add to follow and unfollow test that user's followers include other user, to test 'followers'
Add sample relationships
Add member routes for following and followers
Partial for displaying follower stats
Show stats in home page
CSS for .stats, .user_avatars and .users.follow
Fix bug from user to @user on line 1
Partial for a follow/unfollow form
Add routes for relationships
Create partial to follow a user