>> This week, start your arts viewing with a fascinating documentary on the lives of a powerful curator/collector and his ever controversial photographer lover. Black White + Gray: A Portrait of Sam Wagstaff and Robert Mapplethorpe examines the lives of these two men through those who knew them best, such as close friend Patti Smith, and how Wagstaff’s relationship with Mapplethorpe vaulted them both into careers as art world visionaries, not the least of which…