Miscellaneous clean-up, mostly for upcoming release.

[Repeating for doc.lisp this, from acl2-books check-in:]

Improved documentation about copyrights and made other miscellaneous
improvements to books/system/doc/acl2-doc.lisp.  In particular, fixed
use of a package prefix in new books-certification topic that was
breaking the text-rendered manual (for :doc and ACL2-Doc).


git-svn-id: http://acl2-devel.googlecode.com/svn/trunk@1209 5d84a466-a78b-0930-a311-59b22171a541
Fixed bugs in installation instruction references to LICENSE pathname.

git-svn-id: http://acl2-devel.googlecode.com/svn/trunk@1210 5d84a466-a78b-0930-a311-59b22171a541