added 1line to examples

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vegsoup@633 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
improved stacj

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/vegsoup@634 edb9625f-4e0d-4859-8d74-9fd3b1da38cb