adds validation for name and email address
add password hash gem and update user model for digest
adds password authentication
add test for email downcasting
adds Factory Girl for test objects and an initial user view
adds user register functionality
Finish user signup
Add SSL in production
finishes registration procedure
finishes sign in and sign out
adds cucumber tests
Finishes chapter 8
adds friendly forwarding for non signed in users and updating of profiles
adds pagination
Finish user edit, update, index, and destroy actions
finishes chapter nine
Add user microposts