File encoding + shebang for all Python files

[maaaaz]

Hello there,

First, good job for porting cme to Python3 !

Then, it's time to put a Python 3 shebang + encoding directive on every Python file to avoid any stupid issue of that kind :

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

Starting with setup.py, which has a Python 2 shebang !

Cheers.

[byt3bl33d3r]

Good catch. We'll take a look to make sure they're all there.