==================
- Automate generation of Sphinx HTML docs and running doctest snippets via tox.
- Remove use of '2to3' and associated fixers when installing under Py3k.
The code is now in a "compatible subset" which supports Python 2.6, 2.7,
and 3.2, including PyPy 1.8 (the version compatible with the 2.7 language
spec).
- Bring unit test coverage to 100%.
- Move doctest examples into Sphinx documentation.
- Drop explicit support for Python 2.4 / 2.5 / 3.1.
- Add explicit support for PyPy.
- Add 'setup.py dev' alias (runs ``setup.py develop`` plus installs
``nose`` and ``coverage``).
- Add 'setup.py docs' alias (installs ``Sphinx`` and dependencies).