Update to the version 1.5.1

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/suprahex@69 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Update to the version 1.5.1

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/suprahex@70 edb9625f-4e0d-4859-8d74-9fd3b1da38cb