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

third_party/gsutil/third_party/rsa/doc/installation.rst

Index: third_party/gsutil/third_party/rsa/doc/installation.rst
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+Installation
+==================================================
+
+Installation can be done in various ways. The simplest form uses pip
+or easy_install. Either one will work::
+
+    pip install rsa
+    easy_install rsa
+
+Depending on your system you may need to use ``sudo pip`` or ``sudo
+easy_install``.
+
+Installation from source is also quite easy. Download the source and
+then type::
+
+    python setup.py install
+
+or if that doesn't work::
+
+    sudo python setup.py install
+
+
+The sources are tracked in our `Mercurial repository`_ at
+bitbucket.org. It also hosts the `issue tracker`_.
+
+.. _`Mercurial repository`: https://bitbucket.org/sybren/python-rsa
+.. _`issue tracker`:
+    https://bitbucket.org/sybren/python-rsa/issues?status=new&status=open
+
+
+Dependencies
+--------------------------------------------------
+
+Python-RSA has very few dependencies. As a matter of fact, to use it
+you only need Python itself. Loading and saving keys does require an
+extra module, though: pyasn1. If you used pip or easy_install like
+described above, you should be ready to go.
+
+
+Development dependencies
+--------------------------------------------------
+
+In order to start developing on Python-RSA you need a bit more. Use
+pip to install the development requirements in a virtual environment
+for Python 2.x::
+
+    virtualenv python-rsa-venv-py2x
+    . python-rsa-venv-py2x/bin/activate
+    pip install -r python-rsa/requirements-dev-py2x.txt
+
+or Python 3.x::
+
+    virtualenv python-rsa-venv-py3x
+    . python-rsa-venv-py3x/bin/activate
+    pip install -r python-rsa/requirements-dev-py3x.txt
+
+Once these are installed, use Mercurial_ to get a copy of the source::
+
+    hg clone https://bitbucket.org/sybren/python-rsa
+    python setup.py develop
+
+.. _Mercurial: http://hg-scm.com/