Fix python scripts in src/tools/

tools/site_compare/scrapers/__init__.py

-#!/usr/bin/python2.4
-#
-# Copyright 2007 Google Inc. All Rights Reserved.
+#!/usr/bin/env python
+# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
 
 """Selects the appropriate scraper for a given browser and version."""
 
-__author__ = 'jhaas@google.com (Jonathan Haas)'
-
 import types
 
 # TODO(jhaas): unify all optional scraper parameters into kwargs
 
 def GetScraper(browser):
   """Given a browser and an optional version, returns the scraper module.
 
   Args:
     browser: either a string (browser name) or a tuple (name, version)
 
   Returns:
     module
   """
 
   if type(browser) == types.StringType: browser = (browser, None)
 
   package = __import__(browser[0], globals(), locals(), [''])
   module = package.GetScraper(browser[1])
   if browser[1] is not None: module.version = browser[1]
 
   return module
 
+
 # if invoked rather than imported, do some tests
 if __name__ == "__main__":
   print GetScraper("IE")
-