git-svn-id: svn://svn.r-forge.r-project.org/svnroot/soilwater@42 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
clean up

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/soilwater@43 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
draft of object oriented version of soilwaterfun

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/soilwater@44 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
git-svn-id: svn://svn.r-forge.r-project.org/svnroot/soilwater@45 edb9625f-4e0d-4859-8d74-9fd3b1da38cb