Lots of users ask in Slack what we support (and what we plan on supporting)

We should throw a simple FEATURES.md in the repo.

I believe that this implementation can be used for broadcast communication and also for games that want to hear a channel that is rolling a song for example.

Could you put a shortcut so you can start and end listening to a certain channel?
If you can have the implementation of a shortcut also to adjust the level of the channel. It will be perfect.

In osx/updater/updater.go, we're referencing an ancient Go package, which has moved to a new location. Right now, the updater doesn't build (should we test this on travis?).