* Remove unit_of_measurement from climate base class.
* Updated google_assistant component and tests to use core temp units.
* Fixes
* Convert Alexa component to use core temp units for climate entities.
* Fix tests.
* Converted prometheus component.
* Remove unit_of_measurement from homekit thermostat tests.
* Small fix.
* Implement supported_features for the climate component
* Test supported features
* Convert generic thermostat to supported features
* Max / min temperature are not features
* Fix lint
* Min / max humidity are not features
* Linting
* Remove current temperature / humidity
* Move c-hacker-style constants to boring integers. Booo!
* Refactor all the climate platforms to use the new supported_features
* Force all climate platforms to implement supported_features
* Fix mistakes
* Adapt hive platform
* Move flags into a constant
* Calm the hound
* Return a 0 temperature value when none is found
It's well documented that these TRVs will only return the current temperature
for a short time after the actuator has moved. This means that, usually, they will
not return the current temperature. Setting a non-value here causes errors in the logs
and for the TRV to not show on the dashboard at all
* Fix lint issue