added methods 'model.matrix' and 'model.frame' for lme

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@260 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
deleted old packages

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@261 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
new manual

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@262 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
tests for r^2_GLMM

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@263 edb9625f-4e0d-4859-8d74-9fd3b1da38cb