CG chapter 3, second draft

[Mark Polesky]

...and hopefully the final draft.

http://www.markpolesky.com/norobots/compiling_new.itexi
http://www.markpolesky.com/norobots/compiling_new.itexi.html

Please review and let me know if there are any objections.
This will essentially be a one-to-one replacement of
Documentation/included/compile.itexi.  I didn't make a patch
for it yet; it would be too large for the mailing list
anyway.

Thanks.
- Mark