added debug box with custom Sass css to static pages
Added working (stub) user/show route and view
Added user tests with FactoryGirl
Added gravatar to user view and moved user name and gravatar to sidebar with css
Added signup form and accompanying user create action, tests
Added success and error flashes and tests, refactored application.html.erb using content_tag, removed redundant password digest error, added size parameter to gravatar_for
Finish user signup, add SSL in production