regent: host HDF tarball on sapling, to avoid SSL errors on Titan
regent: host HDF tarball on sapling, to avoid SSL errors on Titan

StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion,StanfordLegion/legion