Initial contribution of the Sonos 2.0 binding

Signed-off-by: Karel Goderis <karel.goderis@me.com> (github: kgoderis)
It could be a (optional) configuration for the SonosHandlerFactory through the ConfigurationAdmin service. It could be described within the binding.xml file. I can help you on doing so after merging the PR, this might make things easier.