XDOC updates

 - Move xdoc::save out of xdoc/top.lisp and into xdoc/save.lisp.  This
   simplifies its integration with cert.pl, and should avoid certain dependency
   problems (e.g., trying to load uncertified oslib/mkdir books).

 - Update documentation for XDOC to reflect this change, and also expand it
   with information about deploying manuals (e.g., server-supported xdoc
   manuals.)

Misc updates

 - Avoid including osets stub in cgen/library-support.lisp



git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2116 303c5b2c-9740-0410-b014-fd8f9db7be32
4v-sexpr library: add SAT-based way to see if a sexpr(-list) is always Boolean
valued, via translation to FAIGs.


git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2117 303c5b2c-9740-0410-b014-fd8f9db7be32
Added gl-force-true-strong and gl-force-false-strong utilities, similar to gl-force-check-strong but only checks one possibility or the other

git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2118 303c5b2c-9740-0410-b014-fd8f9db7be32
gl: push default bdd-mode setting into lower-level books, so it's less likely to clobber user settings

git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2119 303c5b2c-9740-0410-b014-fd8f9db7be32
Make satlink a little more permissive in parsing solver output

git-svn-id: http://acl2-books.googlecode.com/svn/trunk@2120 303c5b2c-9740-0410-b014-fd8f9db7be32