/DistancePropagation.java/1.2/Tue Dec  3 00:00:44 2002//
/FringedPropagation.java/1.1/Tue Dec  3 00:00:44 2002//
/Gradient.java/1.3/Tue Feb 18 18:08:36 2003//
/GradientInternalPropagation.java/1.2/Tue Dec  3 00:00:44 2002//
/MultiTypePropagation.java/1.1/Wed Nov 20 15:33:27 2002//
/PropagationTest.java/1.1/Wed Nov 20 15:33:27 2002//
/PropagationTestExt.java/1.1/Tue Feb 18 18:08:36 2003//
/UnlimitedPropagation.java/1.1/Wed Nov 20 15:33:27 2002//
/VersionedGradient.java/1.3/Tue Dec  3 00:00:44 2002//
/ActiveGradient.java/1.7/Mon Jul 21 17:20:54 2003//
D
