DS-452 Adds helper variables for Shipment Form
DS-452 Adds dosomething_shipment_form into Campaign
DS-452 Display old people copy
DS-452 Display form submitted copy if shipment exists
DS-452 Fixes undefined index errors in custom settings form
Changes per #3128 review
Merge pull request #3128 from aaronschachter/shipment_form

Campaign Shipment Form