score fixed for lvm.missing

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lava@991 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
normal.R -> lava, and loglikMVN added to normal0.R

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lava@992 edb9625f-4e0d-4859-8d74-9fd3b1da38cb