fix some python header

installsystems/config.py

-#!/usr/bin/env python
+# -*- python -*-
 # -*- coding: utf-8 -*-
 # Started 30/05/2011 by Seblu <seblu@seblu.net>
 

installsystems/tools.py

-#!/usr/bin/env python
+# -*- python -*-
 # -*- coding: utf-8 -*-
 # Started 26/05/2011 by Seblu <seblu@seblu.net>