Improve patrole core documentation

Updates patrole's current documentation with improved formatting.
Also updates many sections to add more clarity and detail.

Change-Id: Idebe341e2fcb0ee04db979d41df9bef5395af1b5
diff --git a/doc/source/index.rst b/doc/source/index.rst
index fbe592c..35e8439 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -3,7 +3,7 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-Welcome to patrole's documentation!
+Patrole - an OpenStack Tempest Plugin for RBAC Testing
 ========================================================
 
 Contents:
@@ -22,4 +22,3 @@
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`
-
diff --git a/doc/source/installation.rst b/doc/source/installation.rst
index 76064f1..b532d63 100644
--- a/doc/source/installation.rst
+++ b/doc/source/installation.rst
@@ -3,24 +3,24 @@
 ============
 
 Installation Information
-########################
+========================
 
 At the command line::
 
-    $ pip install patrole
+    $ sudo pip install patrole
 
 Or, if you have virtualenvwrapper installed::
 
     $ mkvirtualenv patrole
-    $ pip install patrole
+    $ sudo pip install patrole
 
 Or to install from the source::
 
     $ navigate to patrole directory
-    $ pip install -e .
+    $ sudo pip install -e .
 
 Configuration Information
-#########################
+=========================
 
 tempest.conf
 ++++++++++++
@@ -28,25 +28,25 @@
 To run the RBAC tempest api test, you have to make the following changes to
 the tempest.conf file.
 
-#. [auth] section updates ::
+#. ``auth`` section updates ::
 
-       # Allows test cases to create/destroy projects and users. This option
-       # requires that OpenStack Identity API admin credentials are known. If
-       # false, isolated test cases and parallel execution, can still be
-       # achieved configuring a list of test accounts (boolean value)
-       use_dynamic_credentials = True
+    # Allows test cases to create/destroy projects and users. This option
+    # requires that OpenStack Identity API admin credentials are known. If
+    # false, isolated test cases and parallel execution, can still be
+    # achieved configuring a list of test accounts (boolean value)
+    use_dynamic_credentials = True
 
-#. [rbac] section updates ::
+#. ``rbac`` section updates ::
 
-       # The role that you want the RBAC tests to use for RBAC testing
-       # This needs to be edited to run the test as a different role.
-       rbac_test_role = _member_
+    # The role that you want the RBAC tests to use for RBAC testing
+    # This needs to be edited to run the test as a different role.
+    rbac_test_role = _member_
 
-       # Enables RBAC Tempest tests if set to True. Otherwise, they are
-       # skipped.
-       enable_rbac = True
+    # Enables RBAC Tempest tests if set to True. Otherwise, they are
+    # skipped.
+    enable_rbac = True
 
-       # If set to true, tests throw a RbacParsingException for policies
-       # not found in the policy.json. Otherwise, they throw a
-       # skipException.
-       strict_policy_check = False
+    # If set to true, tests throw a RbacParsingException for policies
+    # not found in the policy.json. Otherwise, they throw a
+    # skipException.
+    strict_policy_check = False
diff --git a/doc/source/usage.rst b/doc/source/usage.rst
index 5d6c0b9..c2fc6d3 100644
--- a/doc/source/usage.rst
+++ b/doc/source/usage.rst
@@ -1,10 +1,36 @@
+..
+
 ========
 Usage
 ========
 
-To use run patrole tests in Tempest::
+Running Patrole Tests in Tempest
+================================
 
-    If patrole is installed correctly tests are run like any others.
+If Patrole is installed correctly, then the API tests can be executed
+from inside the tempest root directory as follows: ::
 
-    To change the role that the patrole tests are being run as edit rbac_role
-    in the rbac section of tempest.conf.
+    tox -eall-plugin -- patrole_tempest_plugin.tests.api
+
+To execute patrole tests for a specific module, run: ::
+
+    tox -eall-plugin -- patrole_tempest_plugin.tests.api.compute
+
+To change the role that the patrole tests are being run as, edit
+``rbac_test_role`` in the ``rbac`` section of tempest.conf: ::
+
+    [rbac]
+    rbac_test_role = Member
+    ...
+
+.. note::
+
+    The ``rbac_test_role`` is service-specific. Member, for example,
+    is an arbitrary role, but by convention is used to designate the default
+    non-admin role in the system. Most patrole tests should be run with
+    **admin** and **Member** roles. However, some services, like Heat, take
+    advantage of a role called **heat_stack_user**, as it appears frequently
+    in Heat's policy.json.
+
+For more information about the Member role,
+please see: `<https://ask.openstack.org/en/question/4759/member-vs-_member_/>`__.