BRSONOS: Sonos upgrade for Brickbox

It allows to control the popular Sonos multimedia system in a bidirectional way from KNX. In addition to common use controls, the user can set repeat mode, to play defined tracks (both locals or coming from network services or line-in port) or playlists. Another important feature consists of the possibility to define grouping among the players and to easily recall them with KNX groups. Feedbacks information (play, stop, current volume, track, artist, etc.) are available on KNX.