An Op-Ed by Audley Astwood   Keno Hall earned his place in Turks and Caicos music by doing what the greats do. He made the islands sound like themselves. News of his recent passing struck with a clarity that left no space for doubt. The country lost more than a musician. It lost one of the voices that shaped its cultural spine.   Keno Hall Keno and Kaz built their sound together from the first note. They shaped a path that gave the islands a music rooted in instinct and trust