spark-1.6.1.tgz: 24026737 77C64DA7 1D64BA68 F543B450 BBE3D406 90F5E128 BCF23DB4
                 1C6BF295 EB5123C6 99E53C35 315A041E 33275CD7 15C666CC C80C69E1
                 A09CF993 CE188C75