Update documentation and DESCRIPTION

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bvsflex@20 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Update documentation and DESCRIPTION

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bvsflex@21 edb9625f-4e0d-4859-8d74-9fd3b1da38cb