Add show action and stub user show page
Add user page tests with FactoryGirl gem
User profile page test passed
Add gravatar
add sidebar for user profile and gravatar
Add user sign up page tests
Pass signup form tests
Fix user sign up tests, should pass invalid data
Pass signup with invalid data, add Create my account button to user/show view
Add error messages and error partial, error message CSS for signup
Finish user signup. Add flash to user signup upon success