* Adding option for setpoint override mode
Temporary setpoint override mode can now be set on or off. 'Constant' setpoint override mode will be used when Temporary is set to off
* Changes after review comment
Added default value for the setpoint override mode
* Use common strings in opentherm_gw config flow
* Combine TimeourError and SerialException handling
* Fixed test_form_connection_error
* And then fix the flake8 error...
* Change "timeout" to "cannot_connect" msg
* Add config flow support to opentherm_gw.
Bump pyotgw to 0.5b0 (required for connection testing)
Existing entries in configuration.yaml will be converted to config entries and ignored in future runs.
* Fix not connecting to Gateway on startup.
Pylint fixes.
* Add tests for config flow.
Remove non-essential options from config flow.
Restructure config entry data.
* Make sure gw_id is slugified