Further clean up of autoconf
m4/emacs_vm.m4: Define mconditional VM unconditionally
m4/emacs_vm.m4: Fix typo
m4/package_date.m4: Use more robust output redirection
doc/bbdb.texi: Add @dircategory and @direntry
Merge remote-tracking branch 'savannah/master' into suggest-v3.x

Conflicts:
	.gitignore (take upstream)
	README (take upstream)
	README-INSTALL (rm per upstream)
	configure.ac (take upstream)
rm m4/bbdb_with_vm.m4, renamed emacs_vm upstream
README-INSTALL rm'ed, do not install it.  INSTALL is useless to install.
revert autogen.sh to upstream (has unnecessary exit 0 at end)
revert lisp/bbdb.el to upstream, parenthetical date in version string