r.squaredGLMM: can be now applied to models with random slopes (based on idea and R code by Paul Johnson)

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@253 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
manual and packages added

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@254 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
minor change

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@255 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
minor change

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mumin@256 edb9625f-4e0d-4859-8d74-9fd3b1da38cb