first working version of the backfitting algorithm

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@829 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
first working version of the backfitting algorithm

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@830 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
first working version of the backfitting algorithm

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@831 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
first working version of the backfitting algorithm

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/bayesr@832 edb9625f-4e0d-4859-8d74-9fd3b1da38cb