changed 'effect' back to a generic function.  Added file 'effectsclmm' for effects for ordinal mixed effects models using the 'ordinal' package.  This works on for cases where polr would work without the random effects (link='logistic', nominal=NULL, scale=NULL, threshold='flexible'

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/effects@190 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
minor change

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/effects@191 edb9625f-4e0d-4859-8d74-9fd3b1da38cb