Generate a User model and Users controller.
Generate an integration test for user auth.
Install Capybara.
Create a test for user sign up.
Add password confirmation to the sign up spec.
Install bcrypt-ruby so has_secure_password will work.
Get user sign-up spec green.
Move error and notice rendering into partials.
Create a test for username presence validation.
Validate the presence of the username.
Add the 'rename' gem.
Rename the app to 'Einherjar'.