Fix tests under Python 2.6.
setup.py: turn LONG_DESC into __doc__.

Also fix formatting and bump version number.
Exclude compiled docs.

Users can read them on the web, or just compile
themselves.
Add tox.ini.
Add .travis.yml.
Update version history.
Mention contributors in credits.
tox: add doctest.
Fix examples for Python 3.3.

Catched with doctest.
README: rename to .rst, add build status.