Merge remote-tracking branch 'jnothman/object_pairs_hook' into 0.2-maint Conflicts: msgpack/_msgpack.pyx test/test_pack.py test/test_sequnpack.py
Merge remote-tracking branch 'jnothman/object_pairs_hook' into 0.2-maint Conflicts: msgpack/_msgpack.pyx test/test_pack.py test/test_sequnpack.py