added unimplemented scenario: on sign in page there is a link to about
generated controller StaticPages with action about
about page: added content
added step definition: click on
sign in page: added introductory text and link to about
added step definition: Then I see the About page
correct step: Then I see the login page
added menu item to about page
formatting
sign out link: added span around it
correct css: menu span a => menu a
sign out menu item: only if a user is signed in
added menu items login and sign up, if user is not logged in
introduced constants: email_field_size, password_field_size