[IDEA] AirPlay 2 support (including multiroom)

[Rees86]

Hey I stumbled on this while I was drinking my coffee this morning.   It looks like Shariport-Sync has recently released an experimental build for Airplay 2 support so once they get all the bugs worked out it might make it's way into moOde.  I'm not an apple user and generally don't use multi-room audio either but I figured I'd share in case others are interested.  

https://github.com/mikebrady/shairport-s...IRPLAY2.md