apply python changes

SConstruct

@@ -1,3 +1,4 @@
+## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 import os.path
 import build
 

build.py

@@ -1,3 +1,4 @@
+## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 # Copyright (c) 2006 INRIA
 # All rights reserved.
 #

utils/grid.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 import cairo
 import sys