* nuweb/README: updated to version 1.60.
* nuweb/nuweb.w: likewise.
* nuweb/Makefile: likewise.
(%.tex): run nuweb twice.
(%.dvi, %,pdf): run bibtex, then {pdf}latex twice.
Strip off the suffix of .tex files throughout.
* nuweb/master.bib: no longer \input the nonexistent path.sty.
* nuweb/htdocs/index.html: updated link for Z to one that works.