EDI Invoicing

EDI Invoicing

Includes patch for edi4r to make invoice parsing possible.

Also adds OpenILS::Utils::LooseEDI module.  This doesn't try to do the
validation and other helpful things that Business::EDI aims to do, but it
does let us get up and running relatively quickly at getting data from EDI
invoices if we know what we're looking for.

[Amended to add bits about tax, plus release note blurb.]

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Bill Erickson <berick@esilibrary.com>