Added zip_safe info to setup.py file

Author: Byron

lib/git/ext/gitdb

@@ -63,6 +63,7 @@ def _stamp_version(filename):
       license = "BSD License",
       requires=('gitdb (>=0.5.1)',),
       install_requires='gitdb >= 0.5.1',
+      zip_safe=False,
       long_description = """\
 GitPython is a python library used to interact with Git repositories""",
       classifiers = [