A romantic comedy may feel like a strange new direction for director David O. Russell (“I Heart Huckabees,” “The Fighter") but his adaptation of Matthew Quick’s namesake novel is a winner, serving up equal parts romance and uplifting drama. What of Bradley Cooper 2.0? He plays a demanding role to perfection. His Pat Solatino, a bipolar Philadelphia man who spent eight months in a psych ward after a brutal beating put on