rebuild patch queue from patchqueue branch

modified patches:
0002-changing-gridvis.conf-to-reflect-Debian-specifica.patch
debian/gbp.conf: adding xz compression for orig.tar
debian/rules: fix package-contains-timestamped-gzip

Lintian complains about files with timestamps. Fixed up by using -n on
the gzip command.
debian/control: bump up standards version to 3.9.6
lintian: adding new override
debian/gridvis.desktop: adding some Keywords