add functionality for simple models

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/metamisc@242 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Add title for validation help file

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/metamisc@243 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
add print functionalities

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/metamisc@244 edb9625f-4e0d-4859-8d74-9fd3b1da38cb