3.15.91 05-Mar-2015
        - tests: Don't use deprecated override attributes
          (Christoph Reiter) (#743514)
        - Add GLib.MINFLOAT etc. and mark GObject.G_MINFLOAT etc. deprecated
          (Christoph Reiter) (#743514)
        - Emit PyGIDeprecationWarning when accessing deprecated override attributes
          (Christoph Reiter) (#743514)
        - Add namespace and container name to all warnings/error messages
          (Christoph Reiter) (#743468)
        - tests: Add test for GIRepository.UnionInfo.get_size()
          (Garrett Regier) (#745362)
        - Avoid duping filenames when marshalling from Python to C
          (Garrett Regier) (#744719)