Dorothy Stratten will be America's dream girl, the Playmate of the Year. But the camera snapping her beauty doesn't capture the whole story. Out of View is Paul Snider, the man who steered Dorothy to stardom...and finally killed her. Bob Fosse's Star 80 is their spellbinding true story. In the leads, Mariel Hemingway and Eric Roberts deliver haunting performances. In his films (Cabaret, Lenny, All That jazz), Fosse unblinkingly explored