Add minsplit and change minbuck to option

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partdsa@71 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Change leafy references to list numbers

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partdsa@72 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Update version number

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partdsa@73 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fix mean na.rm=T warning

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partdsa@74 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Fix mean na.rm=T warning

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/partdsa@75 edb9625f-4e0d-4859-8d74-9fd3b1da38cb