Updated Gemfile to latest gems under Ruby 2.1.1
Updating README
Straightened out administrator_only_access filter, updated test cases for it.
Merge branch 'master' of github.com:autohome/autohome-web

Conflicts:
	app/controllers/application_controller.rb
	app/controllers/registrations_controller.rb
	features/step_definitions/page_confirmation.rb
	features/users/create_new_user.feature