Prep for polymorphic changes
Beginnings of changing line_item product to buyable
Views updated to change product to buyable
Make giftcard costable
Verify buyable types
Revert "Verify buyable types"

This reverts commit 6060c37cc570a1c5fed9fd1e8a004ba42c7c3c93.
Revert "Views updated to change product to buyable"

This reverts commit 295f1bc5f5397d50baa453774bbed244f20bfc04.
Revert "Beginnings of changing line_item product to buyable"

This reverts commit 0d9873bec07bb1a85c5403fb3b63a1f7a561b41e.
schema