By: Mark Barber Swedish auteur Roy Andersson completes his so-called “living trilogy” with the sombre, contemplative A Pigeon Sat on a Branch Reflecting on Existence, a masterful blend of dour themes and dark humour. Andersson’s Pigeon resists a coherent synopsis.  The film is told through multiple intertwining stories.  At the centre of these stories is a pair of travelling novelty salespeople–Jonathan (Holger Andersson) and Sam (Nils Westblom), both of whom share the same reflective deadpan…