added web reference


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/plot3d@83 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
git-svn-id: svn://svn.r-forge.r-project.org/svnroot/plot3d@84 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
increased version nr - added ref to website

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/plot3d@85 edb9625f-4e0d-4859-8d74-9fd3b1da38cb