Actuators in the driver

Does this count as putting the 'a' in smap? :)
I think this might actually be better written as

    if obj['props']['type'] in [bacnet.OBJECT_ANALOG_INPUT, bacnet.OBJECT_ANALOG_OUTPUT, bacnet.OBJECT_ANALOG_VALUE, bacnet.OBJECT_ANALOG_INPUT]:

There's a bit of an issue with ANALOG_INPUTS because according to the spec they're only writable with OUT_OF_SERVICE = true, but maybe we can not worry too much about that now.

This avoids using the string names which I'm not sure will be super consistent.