================
- Support the common pickle module interface for Python 2.6, 2.7, 3.2, and 3.3.
- Split the Python implementations / tests into Python2- and Py3k-specific
variants.
- Added a fork of the Python 2.7 ``_pickle.c``, for use under Python2.
The fork adds support for the Py3k ``protocol 3`` opcodes.
- Added a custom ``binary`` type for use in Python2 apps.
Derived from ``bytes``, the ``binary`` type allows Python2 apps to pickle
binary data using opcodes which will cause it to be unpickled as ``bytes``
on Py3k. Under Py3k, the ``binary`` type is just an alias for ``bytes``.