* Merge with Debian unstable, remaining Ubuntu changes:
* debian/control.in:
  - Add Vcs-Bzr link
* debian/rules:
  - Set shlibs version
  - Use "Ubuntu" as distributor
* debian/patches/01_check_xrandr_version.patch:
  - XRandR support cannot be disabled
* debian/patches/01_desktopfile_gettext.patch:
  - Gettext support for desktop files.
* debian/patches/02_add_wallpaper_cache.patch:
  - cache wallpapers in local user directory to avoid compute resize and
    transformation at each session start
* debian/patches/80_correct_rgba_use.patch:
  - Fix RGBA issues
* debian/patches/100_load_desired_settings.patch:
  - Enable gnome-settings-daemon to load the desired settings
    saved by the xrandr capplet when the virtual resolution has
    to be saved and the settings cannot be applied immediately.
* debian/watch:
  - Watch unstable series