fixed the rest of the tests by swapping out I18n and removing locales from routes

fixed authentication integration test. updated test_helper to compensate for Devise sometimes having an intermediate redirect

Added registration controller tests, updated reference to Devise's deprectaed 'bypass' with bypass_sign_in', added some test helper to verify redirects to welcome page (for unauthorized attempts) and projects list page (for authorized). Added language_id back to attr_accessible on User model

Added authentication test and registration controller test. Added troubleshooting info to README. Added generic omniauth id to registration form