gnucash 2.6.19 dutch translation

[Paul de Vries]

guncash 2.6.19 on mac osx
defaults write -app Gnucash AppleLanguages '(nl,en)'

on the tax invoice report there are some missing translations in koptekst2:

tekst factuurnummer: Invoice number
aan-tekst: To
kenmerk-tekst: Your ref
tekst opdrachtnummer: Job number
tekst opdrachtnaam: Job name

other messages are in ./Contents/Resources/share/locale/nl/LC_MESSAGES/gnucash.mo
in the download there are no *.po files so i cannot generate a new *.mo
on github there is a .po for "Project-Id-Version: gnucash-2.6.18\n".