Adding file header

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ordinal@119 dd220844-296b-48bf-b704-e9ffb8426404
improving efficiency in computation of standard errors of predictions using predict.clm

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/ordinal@120 dd220844-296b-48bf-b704-e9ffb8426404