Fix setup.py script to be executable (other tools expect this)

setup.py

@@ -1,10 +1,11 b''
+#!/usr/bin/env python
 """This calls the setup routine for Python 2 or 3 as required."""
 
 import sys
 
 if sys.version_info[0] >= 3:
     from setup3 import main
 else:
     from setup2 import main
 
 main()