depend on lattice

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lme4@1879 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
depend on lme4 and lattice

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lme4@1880 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
depend on lattice

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lme4@1881 edb9625f-4e0d-4859-8d74-9fd3b1da38cb