enable ssl on production
add error message test.
add test for welcome message on signup
generate session and authentication test
add session route, controller, test
add signin page and test
fix bugs to pass tests
add remember token to user model, and migrate db
add current_user to session.
add links for signed in users
implement signout
add cucumber to gemfile
install cucumber
update bundle
add cucumber test
use helper method for spec
Merge branch 'sign-in-out'