A SPELLBINDING CAULDRON BOILS OVER, SUMMONING THEATER'S WILD GODS Suffice it to say, there's nothing else in New York quite like Anne Washburn's new play The Burning Cauldron of Fiery Fire, now at the Vineyard Theatre in collaboration with The Civilians. For anyone bored by the constraints of realism and naturalism"and instead drawn to theater… The post Off-Broadway Review: THE BURNING CAULDRON OF FIERY FIRE (Viney…