Add FactoryGirl gem. Modify the user profile page by using Gravatar image.
Add form for user sign up. Also the tests for invalid and valid sign up.
Modified signup page to take valid and invalid form. If valid, will redirect to the user profile with flash message.
Fix the loading error for Gravatar image.
Add SSL in production
Add more tests for invalid signup error messages, valid signup flash messages. Extent gravatar_for method with size. Refactor code to display flash message in layout view.