Some maintainers for different linux distribution are having some
problems with the encoding on different python versions. This change
intents to make all python files define explicitly the encoding, license
and unix line separators. Remove one example of the README.rst file
where a possible non UTF-8 character is used.
* Activate flake8, isort and coveralls in the configuration of tox
* Update code to respect PEP8
* Fix bug in the lang_IT for python 3
* Update the README to include the new converters.
