Choreography by William Forsythe, Mats Ek and Jiri Kylian. Drama Theatre, Sydney Opera House, March 8 MATS Ek’s Bye is the crowd-pleasing work in this rich, concentrated evening of dance but William Forsythe’s Rearray is where the real nourishment is. Forsythe and Sylvie Guillem go way back – nearly a quarter of a century –…