Bug 870575 - Upgrade psutil to 0.7.1; rs=me

Archive obtained from
https://psutil.googlecode.com/files/psutil-0.7.1.tar.gz and checked in
with no modifications.

python/psutil/examples/disk_usage.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
-#
-# $Id: disk_usage.py 1340 2012-06-09 13:42:21Z g.rodola $
-#
+
 # Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.