Set up new material shipper

Shipper must have a Dymo LabelWriter printer.
Shipper must install DYMO Label software, minimum version 8.3.0.xxx, on the computer from which they want to print the labels. (Firefox browser extensions is no longer needed)
Ensure shipper has a record in People table that can be used.
Set up shipper record in External shippers, and link it to the People record.
Determine rules for when this shipper should be used and program that into the system - in the function issue_material_for_shipping().
If shipper will also be shipping out Prayer & Friendship booklets that have been ordered through our system the following functions will need to be modified:
- Adjust add_order() - allow the given country and set the external shipper ID (search for "Determine external shipper")
- Adjust calc_prayer_friendship_booklet_shipping_cost() to calculate shipping cost for the given country

Userlevel:Admin:Procedures:Set up new material shipper