INSTALL MORE DOCUMENTATION
... Clean up INSTALL
... Add "SEE ALSO" section to sbcl.1, and fold the DOCUMENTATION
section there. Also mention Slime in addition to ilisp,
and drop the mention of shell mode and package confusion.
... Make install.sh install the manual, BUGS, SUPPORT, CREDITS,
COPYING and NEWS as well, and make it tell where it put
everything. Don't install sbcl-asdf-install.1.