Added SENSORS to the possible LIST requests.

LIST SENSORS will now return a list of parts with available sensors on it. The part name and sensor type will be listed.
Changed part name in sensor list to be more readable
Merge branch 'listSensors' of https://github.com/palaslet/KOS into palaslet-listSensors
Merge branch 'listSensors' of https://github.com/palaslet/KOS
Merge branch 'palaslet-listSensors'