AP_RangeFinder → AP_SerialManager Relation

File in libraries/AP_RangeFinder	Includes file in libraries/AP_SerialManager
AP_RangeFinder_Benewake.cpp	AP_SerialManager.h
AP_RangeFinder_LeddarOne.cpp	AP_SerialManager.h
AP_RangeFinder_LightWareSerial.cpp	AP_SerialManager.h
AP_RangeFinder_MaxsonarSerialLV.cpp	AP_SerialManager.h
AP_RangeFinder_NMEA.cpp	AP_SerialManager.h
AP_RangeFinder_uLanding.cpp	AP_SerialManager.h
AP_RangeFinder_Wasp.cpp	AP_SerialManager.h
RangeFinder.h	AP_SerialManager.h