Add controller and integration test file for Sessions resource
Add initial test for sign in page for Sessions resource
Add routes for the Sessions resource
Add corresponding actions to the Sessions controller
Add view for sign in page
Get initial sign in tests to pass
Add view and invalid signin test
Add valid signin test
Add signin form and html routes gem
Link Sigin page from the nav bar
Add flash messages for invalid and succesful sign in
Implement remember_token logic in User model
Add session and cookie functionality
Add sign in and sign out functionality with cookies
Add functionality to sign a user in immediately after creating that new user
Add functionality to allow a user to sign out