Smile Adam & Anna: cooling-related updates

All changes:

• Anna: replace setpoint with setpoint_low and setpoint_high when cooling is active.
• Anna: update according to recent Anna-with-cooling firmware updates (info provided by Plugwise).
• Anna: handle cooling_state = on according to Plugwise specification (cooling_state = on and modulation_level = 100).
• Move boiler-type detection and cooling-present detection into _all_device_data().
• Update/extend testing and corresponding userdata.