Add how to participate doc

We have a separated doc for client, so, we need to replicate how to
participate doc too.

Change-Id: I73d9e5cb83a672915cf0110771ae6f79f5f47436

doc/source/how_to_participate.rst

@@ -0,0 +1,69 @@
+How to Participate
+==================
+
+Getting started
+---------------
+
+* Create account on `Github <https://github.com/openstack/sahara>`_
+  (if you don't have one)
+
+  * Make sure that your local git is properly configured by executing
+    ``git config --list``. If not, configure ``user.name``, ``user.email``
+
+* Create account on `Launchpad <https://launchpad.net/sahara>`_
+  (if you don't have one)
+
+* Subscribe to `OpenStack general mail-list <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack>`_
+
+* Subscribe to `OpenStack development mail-list <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev>`_
+
+* Create `OpenStack profile <https://www.openstack.org/profile/>`_
+
+* Login to `OpenStack Gerrit <https://review.openstack.org/>`_ with your
+  Launchpad id
+
+  * Sign `OpenStack Individual Contributor License Agreement <https://review.openstack.org/#/settings/agreements>`_
+  * Make sure that your email is listed in `identities <https://review.openstack.org/#/settings/web-identities>`_
+
+* Subscribe to code-reviews. Go to your settings on http://review.openstack.org
+
+  * Go to ``watched projects``
+  * Add ``openstack/sahara``, ``openstack/sahara-dashboard``,
+    ``openstack/sahara-extra``, ``openstack/python-saharaclient``,
+    ``openstack/sahara-image-elements``, ``openstack/horizon``
+
+
+How to stay in touch with the community?
+----------------------------------------
+
+* If you have something to discuss use
+  `OpenStack development mail-list <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev>`_.
+  Prefix mail subject with ``[Sahara]``
+
+* Join ``#openstack-sahara`` IRC channel on `freenode <http://freenode.net/>`_
+
+* Join public weekly meetings on *Thursdays at 18:00 UTC* on
+  ``#openstack-meeting-alt`` IRC channel
+* Join public weekly meetings on *Thursdays at 14:00 UTC* on
+  ``#openstack-meeting-3`` IRC channel
+
+
+How to send your first patch on review?
+---------------------------------------
+
+* Checkout Sahara code from `Github <https://github.com/openstack/sahara>`_
+
+* Carefully read https://wiki.openstack.org/wiki/Gerrit_Workflow
+
+  * Pay special attention to https://wiki.openstack.org/wiki/Gerrit_Workflow#Committing_Changes
+
+* Apply and commit your changes
+
+* Make sure that your code passes ``PEP8`` checks and unit-tests.
+  See :doc:`development.guidelines`
+
+* Send your patch on review
+
+* Monitor status of your patch review on https://review.openstack.org/#/
+
+

doc/source/index.rst

@@ -21,6 +21,7 @@ Contents:
    :maxdepth: 2
 
    api
+   how_to_participate
 
 Contributing
 ============