Add fuel tank status report support

* Adds support to DroneCAN FuelTankStatus messages
* Adds fuel_tank_status uORB message
* Adds FUEL_STATUS MAVLink stream
* Adds parameter to define max fuel tank capacity

msg/CMakeLists.txt

@@ -98,6 +98,7 @@ set(msg_files
 	FollowTarget.msg
 	FollowTargetEstimator.msg
 	FollowTargetStatus.msg
+	FuelTankStatus.msg
 	GeneratorStatus.msg
 	GeofenceResult.msg
 	GeofenceStatus.msg