Refs #46 -- Add Py3 support.

[Natim]

Hello,

I tried to port the code to Python3 but there is this last doctest I cannot get rid of. Should we rewrite it in unittest? A little help?

[benoitbryon]

About the docstrings, found the following recipes:

• http://stackoverflow.com/questions/1733414/how-do-i-include-unicode-strings-in-python-doctests
• http://joernhees.de/blog/2010/12/15/python-unicode-doctest-howto-in-a-doctest/

[benoitbryon]

@Natim: tried something else for the doctests... is it good for you?