The choreographer on staging Crave with an all-female cast and the struggle of performing with Merce Cunningham's companyJulie Cunningham might have been precision-engineered to dance the repertory of her namesake, Merce Cunningham. During her 10 years performing with the great American choreographer, her long and austerely elegant body brought rare clarity to the intricate technicalities of his work, and her quiet i…