Daemon for the volume wheel

The volume wheel is connected to an A/D converter providing fixed values (no steps).

It should be used to control the master volume of PulseAudio.

There's a very basic version (for ALSA) as a shell script: http://git.goldelico.com/?p=gta04-kernel.git;a=blob;f=Letux/root/volumed;h=e200935a630a6c8a3c145cf483d5c13935549c6b;hb=HEAD

The script uses a lot of CPU power (of course, as it's permanently checking the wheel) and doesn't have any jitter correction.

Both should be fixed with a proper daemon.

The daemon should also use a config file so that users can set their preferred volume range or linearity.