Add users table
Update templates and add sign in and log in forms
Add User class
Add UserQuery class
Add UserDataMapper class
Add some controllers to sign in, log in and log out
Update database creation
Update templates
Update UserQuery class
Update app.php with log in controller
Remove username form in statuses
Update templates
Add findAllByUser method in StatusQuery
Add controller to get statuses by users
Merge pull request #12 from YearDegree/Authentication

Authentication