Add compile time option of using apparent error (angle between true and predicted directions) instead of absolute location error.  It is on by default.
Add compile time option of using apparent error (angle between true and predicted directions) instead of absolute location error.  It is on by default.

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata