Updated test.brain.fit to new tractor.base formats.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rosenblatt1@49 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Updated description to last package change.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rosenblatt1@50 edb9625f-4e0d-4859-8d74-9fd3b1da38cb