Remember when “robotic acting” was an insult? It still is, you say? Not according to one New York troupe. “The underground theatrical superstars Les Freres Corbusier [are premiering] the first production of Hedda Gabler in which half of the major roles are played by robots. Not humans in funny suits, but walking, talking machines performing live onstage. It’s titled, naturally, Heddatron.”