More than five years after his death, Merce Cunningham lives on in fresh and exciting ways. This French company, making its United States debut, has a direct link to the source: its artistic director, Robert Swinston, was a 30-year veteran of the Cunningham company, as a dancer and Merce's right-hand man. The company will perform "Event," a quilt of excerpts that Mr. Swinston has stitched together from Cunningham classics made from 1965 to 1990.