BOULDER — Travis Hunter, CU’s walking cheat code, could make geniuses of us all. But a month into his debut season, Buffs defensive coordinator Robert Livingston is quietly making a case to be Deion Sanders’ best assistant coach hire in Boulder to date. “Coach Livingston is great,” said CU defensive lineman Shane Cokes, whose 3-1 Buffs visit 3-0 UCF on Saturday.