Final version

Vince, I added the products directory and fixed some other directory structure changes that I'd never merged from the semester end. Should all be up-to-date now. ...there are some deletions of calibration output files that I was trying to exclude from my commit butI don't think it's a big deal. This is a pretty big commit that includes postscript versions of figures, the SAGE class files, etc. 

In most cases, you'll need to run pdflatex twice, bibber ,then pdflatex twice again to make sure the bib file gets parsed correctly. (I've read the explanation before but it never made any sense to me; I just do it.)