added users route, and debug output for dev environment
Added test for user show page and redefined BCrypt cost factor for test environment
added gravatar to user profile
Implemented gravatar method, added styling to sidebar, and updated view
implemented signup form and controller method (+ test) for invalid information
added error display (and css) for sign up form
implemented successful signup form submission
Adding the contents of the flash variable to the site layout.
Finish user singup
Add SSL in production