Everyone knows September to be the month of art fairs, but the big Manhattan attractions are just a few of New York’s autumnal offerings. It isn’t quite winter yet, so you can still catch the tail end of an artist-made birdhouse show beside Prospect Park. All the same, a group exhibition of politically charged textiles along the Long Island Sound packs a punch in an area otherwise flooded with wealth. Our other highlights for this month include a sanctuary of African healing out on Governors Island, colorful deconstructions of gender and sexuality, and transmissions from a post-worker dystopia in Brooklyn. * * * Still from Gerardo Dexter Ciprian, Medicina De…