added current_user helper method to ApplicationCOntroller
added Sessions Controller with create and destroy methods
Merge branch 'master' of https://github.com/eigilsagafos/light-it-up into user_auth
Merge branch 'master' of https://github.com/eigilsagafos/light-it-up into user_auth
Merge branch 'master' of https://github.com/eigilsagafos/light-it-up into user_auth
added login page and form to sessions views
Merge branch 'master' of https://github.com/eigilsagafos/light-it-up into user_auth
Merge pull request #7 from eigilsagafos/user_auth

Hey Geoff, looks good. Eigil and Cristian
Merge branch 'master' of https://github.com/eigilsagafos/light-it-up into setup_rspec