Add Ref slide for howitsmade-governance

There are many links of reference sites/topic used in slide
as note (which are only viewable in presenter view).

Those links are helpful for audience to get further details
and good to mention in reference slide.

This commit adds a new reference slide with related links.

Change-Id: I51bc73cf1da86493d9d42f87b029bef9a717688b

doc/upstream-training/source/slides/howitsmade-governance.rst

@@ -211,3 +211,30 @@ Exercise
   the Upstream Collaboration Training Etherpad.
 - Find two other cores in the project and post their names in
   the Upstream Collaboration Training Etherpad.
+
+
+References
+==========
+
+  - `Board election <https://www.openstack.org/election/>`_
+  - `Bylaws of the OpenStack Foundation <https://www.openstack.org/legal/bylaws-of-the-openstack-foundation/>`_
+  - `Foundation mailing list <http://lists.openstack.org/cgi-bin/mailman/listinfo/foundation>`_
+  - `Governance - Election page <https://governance.openstack.org/election/>`_
+  - `List of TC members <https://www.openstack.org/foundation/tech-committee/>`_
+  - `Members of OpenStack User Comittee <https://www.openstack.org/foundation/user-committee/>`_
+  - `openstack-dev mailing list <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev>`_
+  - `OpenStack Technical Comittee Charter <https://governance.openstack.org/tc/reference/charter.html>`_
+  - `OpenStack Technical Comittee page <https://governance.openstack.org/tc/>`_
+  - `OpenStack User Committee <https://governance.openstack.org/uc/index.html>`_
+
+.. note::
+
+ - This slide is for reference links in case people want to get more information later. Presenters
+   do not need to spend time on this.
+
+
+References Cont.
+================
+
+  - `OpenStack User Committee Charter <https://governance.openstack.org/uc/reference/charter.html>`_
+  - `User-committee mailing list <http://lists.openstack.org/cgi-bin/mailman/listinfo/user-committee>`_