Add Dutch translation
* configure.ac: Bump required GPGME version. * po/LINUGUAS: Add dutch. * po/nl.po: New. * po/po/fr.po: Remove spurious file. (cherry picked from commit 64f0522227fa50a11e44e07d4b07cbef9fb8c126)
Commit message amended and:
- Signed-off-by: Andre Heinecke <aheinecke@intevation.de>