Create inc.header.php
Create inc.header.php

Moved the header of index.php to a separate file.

Added several urlparams and corresponding actions:
-maxvolume
-volstep
-idletime
-shutdownafter
-rfidstatus
-gpiostatus
MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID,MiczFlor/RPi-Jukebox-RFID