Purchasing
==========

In the context of Customer Orders, our concern here is making sure the
Buyer knows about them and includes them in the Purchase Order(s)
which they are already placing to the Vendor per normal procedure.

TODO: this has been implemented a couple of different ways thus far
but the "best" has yet to be decided...in particular (how) should the
customer orders and purchase orders be linked?  it is a slight hassle
up front but then can be leveraged during the receiving process...