Fixes PHP Notice: Undefined index
DS-452 Replaces Signup Data Form state dropdown with dosomething_user_get_address_administrative_area_options
DS-441 Creates function to remove extra US states
DS-441 Populates state dropdown for Canada
Adds block comments per #3134 review
Formatting changes per #3134 review
Merge pull request #3134 from aaronschachter/shipment_bugs

Address Administrative Area options variable