Log Message:
Update python-msgpack to 0.1.13.

0.1.13
=======
:release date: 2012-04-21

New
----
* Don't accept subtype of list and tuple as msgpack list. (Steeve Morin)
  It allows customize how it serialized with ``default`` argument.

Bugs fixed
-----------
* Fix wrong error message. (David Wolever)
* Fix memory leak while unpacking when ``object_hook`` or ``list_hook`` is used.
  (Steeve Morin)

Other changes
-------------
* setup.py works on Python 2.5 (Steffen Siering)
* Optimization for serializing dict.

0.1.12
=======
:release date: 2011-12-27

Bugs fixed
-------------

* Re-enable packs/unpacks removed at 0.1.11. It will be removed when 0.2 is released.

0.1.11
=======
:release date: 2011-12-26

Bugs fixed
-------------

* Include test code for Python3 to sdist. (Johan Bergstrom)
* Fix compilation error on MSVC. (davidgaleano)