gnucash maint: Update German translation.

[Christian Stimming]

Updated	 via  https://github.com/Gnucash/gnucash/commit/596d0336 (commit)
	from  https://github.com/Gnucash/gnucash/commit/d3dd8163 (commit)



commit 596d0336c6d10c560004c575936f8bb963ff69dc
Author: Christian <christian at cstimming.de>
Date:   Sat Dec 29 22:18:18 2018 +0100

    Update German translation.



Summary of changes:
 po/de.po | 834 +++++----------------------------------------------------------
 1 file changed, 61 insertions(+), 773 deletions(-)