Imported Upstream version 0.8.0
Merge tag 'upstream/0.8.0'

Upstream version 0.8.0
- Imported Upstream version 0.8.0
- bump to current standards 3.9.6
- min Qt version 5.3.2
- remove build dependency libegl1-mesa-dev, as the Qt-bug because the
  lib was in is resolved with 5.3.2
- added lintian-overrides for man-pages
- added lintian-overrides for category
- fixes debian-lxqt/lxqt-admin #1