Can space define our relationships? It’s a concept that directors Ramon and Silvan Zürcher investigate in their new film “The Girl and the Spider.” Set around the confines of a cramped apartment, the dwelling becomes a central character as important as the roommates — and possibly former lovers — who inhabit it. In the film, Lisa (Liliane Amuat) is about to move out but not before dealing with the peculiar qualities of Mara (Henriette Confurius).