Rover: prepare for 2.44 release

APMrover2/APMrover2.pde

 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
-#define THISFIRMWARE "ArduRover v2.44beta1"
+#define THISFIRMWARE "ArduRover v2.44"
 /*
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by