Update about_imp.h

Added schnurlos as 2nd german translator

src/gui/about_imp.h

@@ -97,7 +97,7 @@ class about : public QDialog, private Ui::AboutDlg{
           <li><u>Finnish:</u> Niklas Laxström (nikerabbit@users.sourceforge.net), Pekka Niemi (pekka.niemi@iki.fi) and Jiri Grönroos artnay(Transifex)</li>\
           <li><u>Galician:</u> Marcos Lans (marcoslansgarza@gmail.com) and antiparvos(Transifex)</li>\
           <li><u>Georgian:</u> Beqa Arabuli (arabulibeqa@yahoo.com)</li>\
-          <li><u>German:</u> Niels Hoffmann (zentralmaschine@users.sourceforge.net)</li>\
+          <li><u>German:</u> Niels Hoffmann (zentralmaschine@users.sourceforge.net), schnurlos (schnurlos@gmail.com)</li>\
           <li><u>Greek:</u> Tsvetan Bankov (emerge_life@users.sourceforge.net), Stephanos Antaris (santaris@csd.auth.gr), sledgehammer999(hammered999@gmail.com) and Γιάννης Ανθυμίδης Evropi(Transifex)</li>\
           <li><u>Hebrew:</u> David Deutsch (d.deffo@gmail.com)</li>\
           <li><u>Hungarian:</u> Majoros Péter (majoros.peterj@gmail.com)</li>\