Add development debugging
Add Users .show
Add Factory Girl gem, factory and test
Speed up Bcrypt in test environment
Add and use Gravatar helper
Add and style user sidebar/aside
Add signup tests
Pass user signup tests, prettify CSS
Initial working form
Strong parameters, also pass invalid signup test
Test for form submission errors
Present signup error messages
Apply red outline to invalid form fields
Redirect to newly created user page
Test for new user welcome flash
Add new user flash; Finish user signup