[CM] fixed doc links

[Rick Taube]

i ran the docs through a link checker and updated the tarfile on ccrma with the fixed links.

ftp://ftp-ccrma.stanford.edu/pub/Lisp/cm/sources/cm-2.4.0.tar.gz

there is also a new build parameter 'save-cm' that, if nil, will cause CM to not save any image. i havent done anything about *readtable* in cm.lisp yet.

finally, on the #! business -- it appears that MCL has already taken #$ so even that isnt useable. im sorry for this confusion, i did test all the lisps before i chose it but obviouly i screwed up somehow. so just keep using #!
when i can find an alterate that works everywhere , otherwise you can just use (find-object 'name) which will always work!