It’s Friday. Maybe you are blasting R. Kelly’s “Ignition” remix and thinking about how wild your night is about to get. If that’s where your head’s at, you might want to hold off on this Aquilo track until Sunday. “I Gave It All” moves slowly and deliberately with a yearning melody, sparse electronics, and desperate vocals. The British duo has been picking up momentum this year, and “I Gave It All” might be their most powerful effort to date.