Adding some debug information in development environment
Sign up - user show page and tests with factories
Sign up - Gravatar image and sidebar
Sign up - TDD Red, basic tests for signing up users
Sign up - design signup form
Sign up - handle form insecurely, forbidden since Rails 4
Sign up - handle form securely with Rails 4 strong parameters
Sign up - signup error display
Sign up - finished, Green
Sign up - TDD Refactor, flash message on successful signup