Updated Insteon Motion Sensor

Adds support for a number of features:
 - Querying of Battery and Light Level States (Not documented by Insteon, but will hopefully remain supported)
 - Child Objects to track the Light Level and Battery States
 - Setting LED brightness
 - Setting Motion Timeout
 - Setting Light Sensitivity
 - Enabling Night Only Mode
 - Enabling On Only Mode
 - Enable Report All Motion

Includes merge request for Unique Message Retry Count