reorganize existing documentation according to the new standard layout

Move existing content around based on the doc-migration specification.

Replace :doc: markup with :ref: to have sphinx keep track of where the
files move and generate valid hyperlinks.

Add a few toctrees and index pages for the new directories.

Depends-On: Ia750cb049c0f53a234ea70ce1f2bbbb7a2aa9454
Change-Id: I253ee8f89d3ec40e39310c18bb87ed1d3d5de330
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

doc/source/cli/authentication.rst

@@ -1,3 +1,5 @@
+.. _authentication:
+
 ==============
 Authentication
 ==============

doc/source/cli/backwards-incompatible.rst

@@ -10,8 +10,8 @@ Should positional arguments for a command need to change, the OpenStackClient
 team attempts to make the transition as painless as possible. Look for
 deprecation warnings that indicate the new commands (or options) to use.
 
-Commands labeled as a beta according to :doc:`command-beta` are exempt from
-this backwards incompatible change handling.
+Commands labeled as a beta according to :ref:`command-beta` are exempt
+from this backwards incompatible change handling.
 
 Backwards Incompatible Changes
 ==============================

doc/source/cli/command-list.rst

@@ -1,3 +1,5 @@
+.. _command-list:
+
 ============
 Command List
 ============

doc/source/cli/command-objects/configuration.rst

@@ -4,6 +4,8 @@ configuration
 
 Available for all services
 
+.. _configuration-show:
+
 configuration show
 ------------------
 

doc/source/cli/commands.rst

@@ -1,3 +1,5 @@
+.. _command-structure:
+
 =================
 Command Structure
 =================
@@ -162,9 +164,10 @@ referring to both Compute and Volume quotas.
 Plugin Objects
 --------------
 
-The following are known `Objects` used by OpenStack :doc:`plugins`. These are
-listed here to avoid name conflicts when creating new plugins. For a complete
-list check out :doc:`plugin-commands`.
+The following are known `Objects` used by OpenStack
+:ref:`plugins`. These are listed here to avoid name
+conflicts when creating new plugins. For a complete list check out
+:ref:`plugin-commands`.
 
 * ``action definition``: (**Workflow Engine (Mistral)**)
 * ``action execution``: (**Workflow Engine (Mistral)**)
@@ -281,7 +284,7 @@ Implementation
 
 The command structure is designed to support seamless addition of plugin
 command modules via ``setuptools`` entry points.  The plugin commands must
-be subclasses of Cliff's ``command.Command`` object.  See :doc:`plugins` for
+be subclasses of Cliff's ``command.Command`` object.  See :ref:`plugins` for
 more information.