* Add Songpal ("Sony Audio Control API") platform
This adds support for a variety of Sony soundbars and potentially
many more devices using the same API.
See http://vssupport.sony.net/en_ww/device.html for list of
supported devices.
* add songpal requirement
* update coveragerc
* fix linting
* add service description to yaml
* add entity_id
* make pylint also happy.
* raise PlatformNotReady when initialization fails, bump requirement for better exception handling
* use noqa instead of pylint's disable, fix newline error
* use async defs and awaits
* Make linter happy
* Changes based on code review, fix set_sound_setting.
* define set_sound_setting schema on top of the file
* Move initialization back to async_setup_platform
* Fix linting
* Fixes based on code review
* Fix coveragerc ordering
* Do not print out the whole exception trace when failing to update
* Do not bail out when receiving more than one volume control
* Set to unavailable when no volume controls are available
Teemu R
Anders Melchiorsen