* Bumped up version to use 0.1.7 of Russound integration module.
Fixed bug arising from not supporting TURN_ON state (fixes issue https://github.com/home-assistant/home-assistant/issues/5012)
Implemented state support in 0.1.7 such that component state is returned from the actual AMP. (Still uses polling model though).
Tested it with home-assitant users @laf (original developer of the module) and @hofsta. Works fine with their Russounds.
* Made styling / compliance changes and updated correct version of russound module on requirements_all.txt.
* Changed handling of properties to be compliant with https://github.com/home-assistant/home-assistant/issues/4210
(Specifcailly added member variables for state, volume and source to cache these values, and introduced Update() method to set their values).
Now returns None if the selected source index that is returned from russound is greater than the length of the specified source list in the yaml config.
Removed unnecesary comment.
* Removed blank line after docstring.
* Removed updated() in class init and added True paramter to add_devices in setup_platform.
* Dropped the no longer needed self.update()
Andrey
Fabian Affolter
Andreas Cambitsis
Adam Mills
Paulus Schoutsen
Neil Lathwood