Selinux policycoreutils Python 2 to Python 3

[Leonidas Da Silva Barbosa]

I'd like to suggest the creationg of a branch in upstream
repository (branch: python-3), to the py2Topy3 refactoring.

Refactoring plan:
- use 2to3 command
- http://docs.python.org/3/whatsnew/3.0.html to review
- tests cases

Regards,
Leonidas.