Initial contribution of the Sonos 2.0 binding

Signed-off-by: Karel Goderis <karel.goderis@me.com> (github: kgoderis)
Would you be able to refactor the code without too much hassle to not require joda-time? Note that Joda is now considered an optional library for ESH solutions and being able to remove it from the stack helps on making openHAB better work on embedded devices.