Use 'app_version' to get version info
Add appropriate information to conf.py
Fix conf.py version bug.
Move tests to root
Change python setup.py test to nosetests
Add coverage preference
Remove testing with Python 3.

I ended up to support Python 3 currently.
It is quite easy to support Python 3 if I don't need to use this application
in Python 2.4...
Add documentations
Bump version