Add oauth2client as a completely separate library.
Reviewed in http://codereview.appspot.com/4630079/
diff --git a/README_oauth2client b/README_oauth2client
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+This is a client library for accessing resources protected by OAuth 2.0.
+
+
+Installation
+============
+
+To install, simply say
+
+ $ python setup.py install
+
+If you want to do a "mock install" and simply extend your PYTHONPATH
+for the current shell to include this folder and the packages in it, do
+
+ $ source setpath.sh
+
+from the root of the project directory.
+
+
+
+Third Party Libraries
+=====================
+
+These libraries will be installed when you install the client library:
+
+http://code.google.com/p/httplib2
+http://code.google.com/p/python-gflags
+
+Depending on your version of Python, these libraries may also be installed:
+
+http://pypi.python.org/pypi/simplejson/
+