* Sonos responsiveness improvements (async_ coroutines, event based updating, album art caching) + Better radio station information
* Docstring fixes.
* Docstring fixes.
* Updated SoCo dependency + fixed file permissions.
* Only fetch speaker info if needed.
* PEP8 fixes
* Fixed SoCoMock.get_speaker_info to get test to pass.
* Regenerated requirements_all.txt + async fetching of album art with caching + added http_session to HomeAssistant object.
* Unit test fixed.
* Add blank line as per flake8
* Fixed media image proxy unit test.
* Removed async stuff.
* Removed last remnants of async stuff.