added relative variation in BuildNIDHR. gs 2014-08-21

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rhrv@162 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
sync

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rhrv@163 edb9625f-4e0d-4859-8d74-9fd3b1da38cb