spree/spree — pull request #1130 by cmar (2012-02-08 22:43:40+00:00)
Title: Promotions Migration to Namespacing and preferences fixes

Fixed issues with promo migration: update polymorphic fields for
namespacing, update new promo fields with old preferences, not deleting
all preferences (bug) and now we are leaving the owner_id and type in
place for extensions to migrate their preferences