Tensor packages



> Oh, ok.  It does seem fixed because I get lowercase for everything.

Actually, it's now _really_ fixed... the previous fix fixed the problem for
lowercase indices, but mucked things up for uppercase ones.

> Ah, ok.  Probably forgot to call print-invert-case or something in
> plot3d

You were talking about another problem, but this was the clue I needed to
really fix my fixes in itensor::show().


Viktor