Apply fix for issue #189

Thanks to @mookman for providing the fix.

setup.py

@@ -3,7 +3,7 @@
 # @(#)setup.py
 #
 #
-# Copyright (C) 2013, GC3, University of Zurich. All rights reserved.
+# Copyright (C) 2013, 2015, GC3, University of Zurich. All rights reserved.
 #
 #
 # This program is free software; you can redistribute it and/or modify it
@@ -26,6 +26,12 @@
 import sys
 import shutil
 
+# fix Python issue 15881 (on Python <2.7.5)
+try:
+    import multiprocessing
+except ImportError:
+    pass
+
 from setuptools.command import sdist
 
 # Newer versions of setuptools do not have `finders` attribute.
@@ -65,7 +71,7 @@ def ansible_pb_files():
 ]
 
 if sys.version_info[:2] == (2, 6):
-    # Python 2.6. 
+    # Python 2.6.
     # Google api python client *requires* argparse
     # cfr. http://code.google.com/p/google-api-python-client/issues/detail?id=299
     required_packages.append('argparse')