* Add new media_player platform: Volumio Media Player
Volumio media player is a rpi music player, this platfor adds http based control of the player.
* Modify mute command to accept boolean
* Adjust mute call to reset volume after unmute
Remove references to volimi"a"
* Use yield from calls in mute and volume calls
Trying to speed up the indication of mute and volume level changes in UI, but doesn't seem to do much.
* Adjust async_add_devices call
Jay Love