* Add mysensors binary sensor.
* Add discovery platforms to binary_sensor base component.
* Replace device_state_attributes with state_attributes in
binary_sensor base class.
* Fix docstrings.
* Add discovery of binary sensor to mysensors component.
* Add child.type as argument to mysensors device_class.
* Move binary sensor types from sensor to binary_sensor module.
* Fix binary_sensor attribute tests. Use state_attributes instead of
device_state_attributes.
This adds a 'sensor_class' property and attribute, which should be either
None or one of several defined SENSOR_CLASSES to indicate contextual
information about what the sensor is measuring.
This allows you to get every door, window, smoke, etc zone from your security
panel into HA. This uses the live eventing feature of pynx584, which means you
get instantaneous signaling into HA when a door opens or something happens,
which is handy for automating lights on when doors open after dark, etc.
Requires update to pynx584 0.2