Adapt watcher documentation for new standards

This patch set makes the following changes:

 * Add index file to each subdirectory of doc/source
 * Update doc/source/index.rst with new links
 * Move content of install-guide to the doc/source/install
 * Minor changes

Depends-On: Ifc5512c0e2373cf3387e0e0498268eab092e52bb
Change-Id: Iecb4f60efb015a56b9b37331859848b287112842

doc/source/contributor/contributing.rst

@@ -0,0 +1,71 @@
+..
+      Except where otherwise noted, this document is licensed under Creative
+      Commons Attribution 3.0 License.  You can view the license at:
+
+          https://creativecommons.org/licenses/by/3.0/
+
+.. _contributing:
+
+=======================
+Contributing to Watcher
+=======================
+
+If you're interested in contributing to the Watcher project,
+the following will help get you started.
+
+Contributor License Agreement
+-----------------------------
+
+.. index::
+   single: license; agreement
+
+In order to contribute to the Watcher project, you need to have
+signed OpenStack's contributor's agreement.
+
+.. seealso::
+
+   * http://docs.openstack.org/infra/manual/developers.html
+   * http://wiki.openstack.org/CLA
+
+LaunchPad Project
+-----------------
+
+Most of the tools used for OpenStack depend on a launchpad.net ID for
+authentication. After signing up for a launchpad account, join the
+"openstack" team to have access to the mailing list and receive
+notifications of important events.
+
+.. seealso::
+
+   * http://launchpad.net
+   * http://launchpad.net/watcher
+   * http://launchpad.net/~openstack
+
+
+Project Hosting Details
+-----------------------
+
+Bug tracker
+    http://launchpad.net/watcher
+
+Mailing list (prefix subjects with ``[watcher]`` for faster responses)
+    http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
+
+Wiki
+    http://wiki.openstack.org/Watcher
+
+Code Hosting
+    https://git.openstack.org/cgit/openstack/watcher
+
+Code Review
+    https://review.openstack.org/#/q/status:open+project:openstack/watcher,n,z
+
+IRC Channel
+    ``#openstack-watcher`` (changelog_)
+
+Weekly Meetings
+    on Wednesdays at 14:00 UTC on even weeks, 9:00 UTC on odd weeks, in the
+    ``#openstack-meeting-4`` IRC channel (`meetings logs`_)
+
+.. _changelog: http://eavesdrop.openstack.org/irclogs/%23openstack-watcher/
+.. _meetings logs:  http://eavesdrop.openstack.org/meetings/watcher/