Remote control updates

[Luke 37133]

You might have noticed the new media source and track selection features in the beta server:

 

https://emby.media/community/index.php?/topic/52635-32362-source-selection/

https://emby.media/community/index.php?/topic/52633-32362-track-selections-before-playback/

 

I've updated the remote control api docs for both senders and receivers:

 

https://github.com/MediaBrowser/Emby/wiki/Remote-control

https://github.com/MediaBrowser/Emby/wiki/Web-Socket

 

Receivers need to indicate support by reporting that they support the command "PlayMediaSource". Without this, the new controls will be hidden when the user selects your player for playback.

 

Technically this is not a general command, but I wanted to have some way to opt-in and indicate support, rather than show the controls and just have users report "not working".

 

Thanks.