It appears that J.S. Bach’s music is to theatre-dance what whipped cream is to chocolate. Masterworks such as Trisha Brown’s MO, George Balanchine’s Concerto Barocco and a plethora of less-known, though equally acclaimed compositions owe a great deal to the giant of baroque music. Wayne McGregor is the most recent addition to this illustrious roster of successful Bach-inspired dance-makers with Tetractys —The Art of Fugue, which world-premièred last Friday.