Fill out the rangefinder properties from the rangefinder message

[AndersonRayner]

Fills out the rangefinder properties (field of view, min_range, and max_range) in the rangefinder_msg from the mavlink message.

I haven't updated the radiation_type field as the enums in the sensors_mgs::Range don't match the MAV_DISTANCE_SENSOR enums.

[vooon]

But need to wait for mavlink to have that new fields.