Add gsutil 4.13 to telemetry/third_party

tools/telemetry/third_party/gsutil/third_party/apitools/README.rst

+google-apitools
+===============
+
+|pypi| |build| |coverage|
+
+``google-apitools`` is a collection of utilities to make it easier to build
+client-side tools, especially those that talk to Google APIs.
+
+**NOTE**: This library is stable, but in maintenance mode, and not under
+active development. However, any bugs or security issues will be fixed
+promptly.
+
+Installing as a library
+-----------------------
+
+To install the library into the current virtual environment::
+
+   $ pip install google-apitools
+
+Installing the command-line tools
+---------------------------------
+
+To install the command-line scripts into the current virtual environment::
+
+   $ pip install google-apitools[cli]
+
+Running the tests
+-----------------
+
+First, install the testing dependencies::
+
+   $ pip install google-apitools[testing]
+
+and the ``nose`` testrunner::
+
+   $ pip install nose
+
+Then run the tests::
+
+   $ nosetests
+
+.. |build| image:: https://travis-ci.org/google/apitools.svg?branch=master
+   :target: https://travis-ci.org/google/apitools
+.. |pypi| image:: https://img.shields.io/pypi/v/google-apitools.svg
+   :target: https://pypi.python.org/pypi/google-apitools
+.. |coverage| image:: https://coveralls.io/repos/google/apitools/badge.svg?branch=master
+   :target: https://coveralls.io/r/google/apitools?branch=master