Imported Upstream version 5.1.1
Merge tag 'upstream/5.1.1' into debian/sid

Upstream version 5.1.1

# gpg: Unterschrift vom Do 18 Dez 2014 19:44:58 CET mittels RSA-Schlüssel ID 251D1DB0
# gpg: Korrekte Unterschrift von "Carsten Schoenert <c.schoenert@t-online.de>"
rebuild patch queue from patchqueue branch

modified patches:
0002-changing-gridvis.conf-with-additional-comment.patch