Mustang 1.7.6, 1.7.7 and 1.7.8

Mustang 1.7.6, 1.7.7 and 1.7.8

The releases of the open source e-invoice library Mustang from February 6th, May 26th and June 14th 2020 allowed among others the specification of a shipping address, invoices for intra community supply and corrected gross prices in ZUGFeRD 2 invoices.