[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/oauth2client/README.md

Index: third_party/gsutil/third_party/oauth2client/README.md
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+[![Build Status](https://travis-ci.org/google/oauth2client.svg?branch=master)](https://travis-ci.org/google/oauth2client)
+
+[![Coverage Status](https://img.shields.io/coveralls/google/oauth2client.svg)](https://coveralls.io/r/google/oauth2client?branch=master)
+
+This is a client library for accessing resources protected by OAuth 2.0.
+
+[Full documentation](http://google.github.io/oauth2client/)
+
+Installation
+============
+
+To install, simply say
+
+    $ pip install --upgrade oauth2client
+
+Contributing
+============
+
+Please see the
+[contributing page](http://google.github.io/oauth2client/contributing.html)
+for more information. In particular, we love pull requests -- but please make
+sure to sign the contributor license agreement.
+
+Supported Python Versions
+=========================
+
+We support Python 2.6, 2.7, 3.3+. More information
+[in the docs](http://google.github.io/oauth2client/#supported-python-versions).