1.5.0: Preparations for European "EN16931" Standard on e-invoicing

Mustangproject is doing it's homework and now supports
the latest developments around ZUGFeRD 2.0/"Factur-X" in it's
recently published version Mustangproject 1.5.

Both ZUGFeRD 2.0 and Mustangproject are therefore on it's way to
support the European Standard on e-invoicing EN16931 released by the
CEN to facilitate directive 2014/44/EU.

The directive, standard and implementations will make the
acceptance of compliant electronic invoices mandatory for EU
and national institutions as of end 2018 and require suppliers
to submit according electronic invoices by 2020-11-27.

Mustangproject 1.5 now already supports the amendments and new profiles
owed to the franco-german cooperation between "Forum elekronische
Rechnung Deutschland" (FeRD) and
"Forum National de la Facture Electronique" (FNFE) which
culminated in a common standard "Factur-X" and
additionally supports the publicly reviewed version of
the EN16931 profile ("part 1") as published on
http://www.ferd-net.de/aktuelles/meldungen/kommentierung-zugferd-2.0.html.

Additionally several bugs were fixed and
the integrated ZUGFeRD tool has been enhanced. It now
e.g. also allows as the migration of ZUGFeRD 1.0 XML to the current
ZUGFeRD 2.0 (public review version).