In Berlin for a while, everyone talked about Caesar must die, a historical and literary reenactment filmed by Paolo and Vittorio Taviani in superb documentary style--but it's a feature film documenting a jail bound theater production. The Tavianis (Padre Padrone, Kaos), who are now in their eighties, entered a high-security prison near Rome to film a production of Shakespeare’s “Julius Caesar.” Mixing footage of the final production with