Maps a quickbooks value from the qb_data API to a CCK field.  The design goal
is then to have other CCK values map to Quickbooks fields, so you can store
as much or as little Quickbooks data as you'd like to store in your nodes.

When your nodes are updated, the records are flagged for an update into
Quickbooks.  Similarly, when QB data changes, your nodes are updated on the
next QBWC request.

This is an interim commit, and the field  mappings don't actually work yet.
But it's a start and it rocks! Go me!