updates

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/niftir@454 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
bigextensions updates

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/niftir@455 edb9625f-4e0d-4859-8d74-9fd3b1da38cb