made major discovery: Newton convergence depends on overall normalization of psi. If too big, it doesn't converge! Added -norm runtime parameter. I think the nonconvergence that's been happening since my sum-norm to max-norm commit on Jan 14/2014 may also happen if I use sum norm and set it to something higher than 1.0. Anyways, max norm greatly increases the sparsity of the problem, so I'm gonna use that.