First real release after getting some feedback from homeassistant users fixing various issues.
Other highlights:
* An improved support for notifications is also added, to be used later for getting changes
immediately without polling the device.
* Support for devices implementing only the 'xhrpost' protocol using HTTP POST instead of
websockets for communication, including some (all?) sony bravia models.
The protocol to use is decided automatically, but can be overridden with --post or --websocket