Add Micropost, related with User
Order microposts by created_at, add destroy dependence and content validations
Show microposts on User profile page
Add micropost posting on home page
Add a proto-feed
Add microposts destroying
Add Relationship to support following and followed
Add view: stats, follow & unfollow form
Add following and follows pages
Make the follow/unfollow button work
Add Ajax feature to the follow button
Feed the followings' microposts only