Support becoming a ChromeCast server

[hh]

There's been a few approaches:

https://github.com/lanceseidman/PiCAST/branches

dz0ny/leapcast#130

But this comment gives me a bit of hope:

thibauts/node-castv2#2 (comment)

Also there was no magic, there has been only drm.json file in the apk full of pregenerated daily Chromecast V2 protocol keys (for one month period). I think author of YouMap Receiver just pregenerated them on rooted Chromecast. Maybe this can be solution for opensource implementation - someone with rooted Chromecast can pregenerate daily keys for a long period (something like many many years) and publish them anonymously on net

I have a broken (the hdmi cable portion broke) but it still boots when I plug it in via usb. Maybe I could follow http://cord-cutters.wonderhowto.com/how-to/root-your-chromecast-0157253/ and get the rooted Chromecast up and see if we could pregenerate a heap of keys for later use.