OD-11 loudspeakers

Add media player support for OD-11 wireless loudspeakers. The OD-11 supports music playback over Airplay, Spotify Connect, and through a JSON/WebSockets based API, which can be seen in the JavaScript-code powering Orthoplay.com: See the (unfortunately) minified code. The company have earlier said that they were looking into adding support for Google Cast, but this has not yet been done. There is also a third-party library for Node.js available.