added Chorus strategy

added a strategy to support [Chorus](https://github.com/jez500/chorus), a super-nice web UI for XBMC/Kodi.

Controls XBMC or local playback depending on which you have active in your browser.
@trhodeos yeah, it's a bit problematic.
Most people probably run it on their local network, so something like 192.168.1.1.  You could set an alias in your hosts file like _chorus.go_ or similar, but that doesn't happen out of the box.  Also if you expose it through a public URL that would change from user to user (most would probably use a dynamic DNS service, for example)...

Is there any other way to identify a tab apart from its URL or title?