WS-1427 Delivery Directory Improvements
Implements the delivery directory improvements per https://open-confluence.nrao.edu/display/SPR/Delivery+Directory+Improvements?showComments=true#DeliveryDirectoryImprovements-AncillaryProducts
Implements the delivery directory improvements per https://open-confluence.nrao.edu/display/SPR/Delivery+Directory+Improvements?showComments=true#DeliveryDirectoryImprovements-AncillaryProducts