Volume setter

[bichlepa]

This flows may be used by other flows in order to set volume settings.
There are four flows:
- Lautstärke stumm: Mute
- Lautstärke leise: silent
- Lautstärke nomal: normal
- Lautstärke laut: loud

If music is playing, media volume won't be set.

Download: https://dl.dropbox.com/s/n4k7n0vhys50d0 ... %A4rke.xml