When the banshees of the past come calling in Jez Butterworth's fearsome The Ferryman, you can bet their shrieking will be blood curdling. Directed by Sam Mendes (Skyfall) and opening tonight on Broadway at the Bernard B. Jacobs Theatre, the Olivier-award-winning play is a stunner, stitching familiar elements of Irish pastoral drama, The Troubles history and Butterworth’s magical, myth-tapping touches into something as powerful as anything on today’s stage. If nothing…