Contrib Scripts don't work with Python 3

[Sebbito]

While trying to build this software I've come across a problem on more modern systems.
The python scripts in the contrib folder are just meant to be used with Python 2.

It points to /usr/bin/env python which (on todays systems) is almost always Pyton 3.
Sadly the scripts are NOT Python 3 compatible and tells the user to use Python 2.0 or later which Python 3 technically is.

Manually changing the required interpreter fixes the issue.