It was just over a year ago that UK playwright Bryony Lavery’s career appeared to be on the verge of imploding. Accused of plagiarizing large portions of her award-winning play, “Frozen,” from a New Yorker profile of a psychologist specializing in serial killers, Lavery argued vociferously against the charges, but faced an avalanche of publicity. But instead of killing her career, the accusations caused the artistic community to rally around her, and even the New Yorker author rushed to her defense.