stable version.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/optimizer@808 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
minor chg

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/optimizer@809 edb9625f-4e0d-4859-8d74-9fd3b1da38cb