- changes in computation of knots for mgcv-based spline fits
- small change in computation of parameters


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/opm@620 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
warning added to do_aggr() in case of duplicated time points


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/opm@621 edb9625f-4e0d-4859-8d74-9fd3b1da38cb