Worked some on the manual, made corrections and additions ...

Worked some on the manual, made corrections and additions to the hash, MAC, and RSA chapters. Even after adding the new ECC and build documentation I’ll make an additional half dozen passes looking for errors and missing stuff. Looks good for a Dec 1st printing. Also got a few quotes for the back cover from Greg Rose and Paul Kocher (testimonials on a free product? Sure why not!)