delete obsolete book gify-clause-proc.lisp

git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2205 303c5b2c-9740-0410-b014-fd8f9db7be32
Various updates...

Documented cert.pl in xdoc.  (fixes issue 49)

Moved deduction/passmore to projects/equational
  - Added XDOC documentation to projects/doc.lisp
  - Deleted unnecessary Makefile and Readme.lsp

Removed short-test from books/Makefile (Matt says he doesn't need it)

XDOC: Changed xdoc-extend to cause an error instead of a warning if asked to
extend a non-existent topic.  Fixed bug with trying to extend
std/io/read-object$. (fixes issue 111)

git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2206 303c5b2c-9740-0410-b014-fd8f9db7be32