Add devise user model
Create signing in
Add remember me button + normal form view
Try to make a current user
Create sign out button functionality and make retransitions from sign in page and task lists page depends on existens of current user
Make task_list form not open when user is'n signed in
Make sign up and some styling
Add user_id table to tasklist model + make user has many task lists + fix task_list controller to add change and output task lists depends on user