Debugging

Round...I've lost count. Anyway, fixed a bug in the KDE so that if you ask for
an estimate with zero samples, your probability is... zero. Also, now switched
to doing everything in log-space instead of scaling. Now it appears that the
stuff converges, and later parts of the sequence don't all go to zero. Now,
however, we have our basic test situation converging to something other than
the correct parameters. Further testing required... yada yada yada