Insteon_RemoteLinc:  Add RemoteLinc_Battery Object

This is a generic object that is "tied" to the battery events in the parent RemoteLinc.  It can be used to display the battery voltage on the RemoteLinc on the MH web page or to directly tie events to rather than using the low_battery_event code.
Merge branch 'insteon_remotelinc' into running_fanlinc