Add google-endpoints to third_party/.

third_party/google-endpoints/six-1.10.0.dist-info/DESCRIPTION.rst

Index: third_party/google-endpoints/six-1.10.0.dist-info/DESCRIPTION.rst
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+Six is a Python 2 and 3 compatibility library.  It provides utility functions
+for smoothing over the differences between the Python versions with the goal of
+writing Python code that is compatible on both Python versions.  See the
+documentation for more information on what is provided.
+
+Six supports every Python version since 2.6.  It is contained in only one Python
+file, so it can be easily copied into your project. (The copyright and license
+notice must be retained.)
+
+Online documentation is at https://pythonhosted.org/six/.
+
+Bugs can be reported to https://bitbucket.org/gutworth/six.  The code can also
+be found there.
+
+For questions about six or porting in general, email the python-porting mailing
+list: https://mail.python.org/mailman/listinfo/python-porting
+
+