After a dynamite run in the 1970s, working under luminaries like Altman, Kubrick, Allen, and Gilliam, Shelley Duvall's career went... other places. Here, Marty and Scott scour the back half of this great actor's filmography... mostly so that you don't have to. Films we pressed against our eyeballs this week: Roxanne (1987, Dir. Fred Schepisi) at