Disable carrier_computation for sale creation
Fix case if line don't have product
Merge pull request #22 from tarunbhardwaj/shipment_on_line_type

Shipment should be calculated for SaleLine of line type only
Merge pull request #20 from tarunbhardwaj/fixed-carrier-computation

Disable carrier_computation for sale creation
Merge pull request #23 from tarunbhardwaj/develop

Changed service type to selection field in view
Handle special case for shipment from US to PR or CA