Saturday evening was the crowning night of the SF Jazz Festival for me for two great jazz legends of our time were performing at the Masonic Auditorium, Shirley Horn and Ahmad Jamal. Shirley's set opened differently than it had in the past. George Mesterhazy replaced Shirley on the piano, Eddie Howard replaced the late Charles Ables on "the baas" (as Shirley would say) and her old faithful, Steve Williams was on the drums. They warmed up the crowd with an instrumental. Shirley was then wheeled o