Thank you, Harold Prince. On Wednesday, the legendary producer-director - a transformative figure on Broadway whose work has reverberated into every other corner of the entertainment world -passed away at the age of 91. Thank you, Hal, for the creepily alluring Emcee bidding us "Willkommen" to the cabaret; for the fiddler, forever up on that roof; for the ghosts haunting the Weissman Theatre for the final time; for the chandelier crashing to the floor of the Paris Opera House; for the