Fix reference to Spree::Core::ControllerHelpers::Order
Bump selenium-webdriver gem version to support Firefox 15
Update for new admin redesign

Fixes #21
Login success is a success, not a notice message
Use master spree
Must include current_order helper inside UsersController
Correct unauthorized checks in specs
Remove useless new action definition inside UserSessionsController
Include correct ControllerHelpers sub-modules into user_registrations and user_passwords controllers
Don't restrict to just master branch
Require devise-encryptable in engine so main app doesn't have to add to Gemfile.

Fixes #46
Check if CheckoutController and OrdersController are defined before decorating them
Add ActionController::Metal decorator so that API has access to spree_current_user