Gradient flow and scale setting on MILC HISQ ensembles

Office of Science of the U.S. Department of Energy; National Science Foundation's Teragrid/XSEDE Program; NSF [OCI-0725070, ACI-1238993]; State of Illinois; National Science Foundation [OCI-0832315, PHY-1067881, PHY-10034278, PHYS-1417805, PHY-1316748]; U.S. Department of Energy [DE-FG02-91ER40628, DE-FC02-12ER41879, DE-FG02-91ER40661, DE-SC0010120, DE-FG02-13ER-41976, DE-AC02-98CH10886, DE-AC02-07CH11359]