pvol.py - Commandline audio volume utility with an optional GTK progressbar.
          After first call remains in memory some time or all the time if has
          been launched as daemon.
          
          Examples:
              pvol.py -c -5
              pvol.py -c +5
              pvol.py -m
          	
          or if launched as daemon:
              qdbus org.volume.VolumeService /VolumeService adjust_volume -5 False
              qdbus org.volume.VolumeService /VolumeService adjust_volume +5 False
              qdbus org.volume.VolumeService /VolumeService switch_mute True