ART AGENDA LISTS UPCOMING EVENTS, EXHIBITION OPENINGS AND TALKS HAPPENING THIS WEEK IN BLACK ART   Ongoing | Brooklyn, N.Y.: “Crossing Brooklyn: Art from Bushwick, Bed-Stuy, and Beyond,” a major survey of more than 100 works by 35 Brooklyn-based artists and collectives, includes Linda Goode Bryant and Project EATS, Aisha Cousins, Heather Hart, Steffani...