states.js rendered with wrong layout causing JS errors

[shaicoleman]

states.js is rendered with the application layout, when it should be renedered without any layout.

In app/controllers/spree/states_controller.rb

it should be changed from:
respond_with @state_info = Spree::State.states_group_by_country_id.to_json
to:
respond_with @state_info = Spree::State.states_group_by_country_id.to_json, :layout => nil

[radar]

Fixed with the above commits. Thanks!