doc clarification

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lattice@757 3a60a7e4-63ee-4330-9c61-e6b197b972ce
update version

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lattice@758 3a60a7e4-63ee-4330-9c61-e6b197b972ce