sendPOSI command change (double for lat/lon/h) (#111)

* Updated POSI to use doubles for lat/lon/alt, as step size for floats was unacceptably large at high longitudes.

C/playbackExample/src/main.c

@@ -2,7 +2,7 @@
 //National Aeronautics and Space Administration. All Rights Reserved.
 //
 //DISCLAIMERS
-//    No Warranty: THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY KIND, 
+//    No Warranty: THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY KIND,
 //    EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY THAT
 //    THE SUBJECT SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
 //    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY
@@ -67,4 +67,4 @@ int main(void)
 	}
 
 	return 0;
-}
+}