rearrange existing documentation to fit the new standard layout

Change-Id: Ieded73a772471f6b2a32b489b4e3fc33a3daf33e

doc/source/contributor/index.rst

@@ -2,4 +2,4 @@
 Contributing
 =============
 
-.. include:: ../../CONTRIBUTING.rst
+.. include:: ../../../CONTRIBUTING.rst

doc/source/history.rst

@@ -1 +0,0 @@
-.. include:: ../../ChangeLog

doc/source/index.rst

@@ -8,20 +8,11 @@ as `root` from OpenStack services.
 .. toctree::
    :maxdepth: 2
 
-   installation
+   install/index
-   usage
+   user/index
-   contributing
+   contributor/index
 
-Release Notes
+.. rubric:: Indices and tables
-=============
-
-.. toctree::
-   :maxdepth: 1
-
-   history
-
-Indices and tables
-==================
 
 * :ref:`genindex`
 * :ref:`modindex`

doc/source/user/history.rst

@@ -0,0 +1 @@
+.. include:: ../../../ChangeLog

doc/source/user/index.rst

@@ -0,0 +1,9 @@
+===================
+Using oslo.rootwrap
+===================
+
+.. toctree::
+   :maxdepth: 2
+
+   usage
+   history