Revert md5 sum back (mistake).

setup.py

@@ -19,7 +19,7 @@ if not os.path.exists('mock.py'):
     mock_py = zipfile.ZipFile(cStringIO.StringIO(urllib.urlopen(
         'http://ufpr.dl.sourceforge.net/project/python-mock/python-mock/version%200.1.0/pythonmock-0.1.0.zip'
         ).read())).read('mock.py')
-    if hashlib.md5(mock_py).hexdigest() != '7f51aaf031f7dd022e604a8567f8e52b':
+    if hashlib.md5(mock_py).hexdigest() != '79f42f390678e5195d9ce4ae43bd18ec':
         raise EnvironmentError("MD5 checksum mismatch downloading 'mock.py'")
     open('mock.py', 'w').write(mock_py)