Alvin Ailey, which opens in New York on Friday — greatness recognizes greatness when Cicely Tyson calls him “the Pied Piper of modern dance” at his 1988 Kennedy Center Honors induction.And for this master of movement — who founded the internationally renowned Alvin Ailey American Dance Theater company in New York in 1958 — it was all about bringing black people to the traditionally white world of dance.“I wanted it to be the kind of dancing that could be done for the man on the street, for the