BDG_Oden
Volumio Additions
Based on prior work of:
https://github.com/Maschine2501/NR1-UI and https://github.com/diehardsk/Volumio-OledUI
This adds code to respond to a RC5 remote and control input selections and volume control from a rotary encoder.
Commands are sent to a TI PGA2320 volume control and a PCF8574A for input selection