Make MinVolume  configurable
Make MinVolume  configurable

I often have the case that my son reduces the Volume to a value that I cannot recognise if the phoniebox is playing. To get rid of this I made some code to set a minimum Volume.
Now I have seen that someone has done something comparable. So I only added things I have done additionally.
MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID