The questing Czech-born playwright gave us plays that explored arcadias, utopias and affecting notions of home Tom Stoppard's breakthrough play opened on a bare stage, with two characters in the middle of nowhere tossing a coin. Rosencrantz and Guildenstern, notoriously mix-uppable minor characters from the lower reaches of the Hamlet cast list, meet actors on the road to Elsinore, face the haughty Danish court, boar…