Updated Dutch translation
Updated Dutch translation
build: Use AC_PROG_MKDIR_P

Fix the build using newest autoconf.

https://bugzilla.gnome.org/show_bug.cgi?id=679004
(cherry picked from commit aebd85d33c1cdbfb75c10436a6a49d76738ef7eb)
[l10n] Updated German doc translation
Updated German help translation