Heavy-hitting holdovers Foxcatcher, The Theory Of Everything and Birdman were robust in expansion in the specialty release side of the box office this weekend. Meanwhile, a pair of limited-release newcomers, A Girl Walks Home Alone At Night and doc Monk With A Camera - both Kino Lorber releases - bowed with solid numbers. A Girl, Ana Lily Amirpour's self-described “Iranian vampire Western” that debuted at Sundance, opened in two theaters in New York and L.A., grossing…