* Move more constants to const.py
* Import constants directly from const
* ATTR_ENTITY_ID is not defined in media_player
* MEDIA_PLAYER_PLAY_MEDIA_SCHEMA is still in __init__.py
* Correct imports in tts
* PLATFORM_SCHEMA, SCHEMA is still defined in __init__.py
* Pandora imports several services
* Some additional fixes for move of const in media_player
* Fix hound lengths
* Add LG soundbar support
We can autodiscover these, so for now let's skip any local configuration.
Currently we expose volume, source and equaliser preset - we can expose the
other volume controls and options as well if necessary, but I don't know
whether it's worth it.
* Add discovery of LG devices
This is a generic discovery type that doesn't obviously contain enough
information to identify whether we're talking to a speaker system or any
other kind of device - on the other hand I haven't been able to find any
other LG devices that respond like this, so we can cross that bridge when
we get to it.
* Lint
Joakim Plate
Matthew Garrett