Merge pull request #1298 from craigcitro/fix_setup

Add back the namespace_packages arg in setup.py.

python/setup.py

@@ -210,6 +210,7 @@ if __name__ == '__main__':
         "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
         ],
+      namespace_packages=['google'],
       packages=find_packages(
           exclude=[
               'import_test_package',