update code.zip file according to the change suggestions.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/semtools@336 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
change README to say 3.R files.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/semtools@337 edb9625f-4e0d-4859-8d74-9fd3b1da38cb