keep.effs added
new tests added

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lmertest@77 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
tol was changed in testContrast.R

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/lmertest@78 edb9625f-4e0d-4859-8d74-9fd3b1da38cb