[Csv] Update PEP?

[Skip Montanaro]

    Andrew> I think the PEP needs updating - the API hasn't changed too
    Andrew> much, but there's a few warts in there. The docstring for the C
    Andrew> module is probably the most accurate reference at the
    Andrew> moment. Can someone give me a hand and go over the PEP?

Sure, I'll try to update it today.  Also, note that libcsv.tex is supposed
to be a section for the library reference manual.  That probably needs
significant attention at this point as well.

Skip