automatic concerto server discovery

[mfrederickson]

It would make the setup easier [more of a plug and play] to have automatic concerto discovery by bandshell.

This could happen by having concerto register itself as a service (to avahi) using the dnssd gem. Then bandshell, when it needs the server, could browse for it and find it that way.

By having bandshell also advertise itself, the concerto-hardware plugin could also list players [screens] that are discovered but not yet configured, and certain [screen] information could be gleaned from the advertisement.

Alternatively, if you don't want another gem or the dnssd complication, you could use the simpler UdpPing method explained here: http://grefab.blogspot.de/2012/05/simple-service-discovery-via-udp-in.html

[kench]

Given the increasing popularity of the DIAL multiscreen protocol, which is built on top of UPnP, it may be a good idea to implement this.

I've worked with @bamnet to register a DIAL application ID ("Concerto") when I was porting the Concerto TV app to the Fire TV, so we have some initial work already completed in this area.