update docs for consistency

adjust the index file to be more readable for the field guide

adjust titles to make more sense when displayed in top level index

change theme to 'nature', which is closer to the openstack default
style. Will eventually write our own style here.

Change-Id: I4f5fed65f9e26a4e4d333b1be4ed02c9ec246b9a
diff --git a/doc/source/conf.py b/doc/source/conf.py
index a55df76..fd8cbb5 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -91,7 +91,7 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'default'
+html_theme = 'nature'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
diff --git a/doc/source/index.rst b/doc/source/index.rst
index e37e250..1ca7344 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -3,6 +3,7 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
+===================================
 Tempest Testing Project
 ===================================
 
@@ -14,10 +15,15 @@
    overview
 
 
-Field Guide:
+-------------------------------
+Field Guides
+-------------------------------
+Tempest contains tests of many different types, the field guides
+attempt to explain these in a way that makes it easy to understand
+where your test contributions should go.
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 1
 
    field_guide/index
    field_guide/api
@@ -28,6 +34,7 @@
    field_guide/whitebox
 
 
+==================
 Indices and tables
 ==================
 
diff --git a/tempest/README.rst b/tempest/README.rst
index 63f3ad0..0b080fe 100644
--- a/tempest/README.rst
+++ b/tempest/README.rst
@@ -1,5 +1,6 @@
-Tempest Field Guide
-========
+============
+Tempest Field Guide Overview
+============
 
 Tempest is designed to be useful for a large number of different
 environments. This includes being useful for gating commits to
diff --git a/tempest/stress/README.rst b/tempest/stress/README.rst
index 2c431ed..2fcdf2e 100644
--- a/tempest/stress/README.rst
+++ b/tempest/stress/README.rst
@@ -1,4 +1,4 @@
-Quanta Research Cambridge OpenStack Stress Test System
+Tempest Field Guide to Stress Tests
 ======================================================
 
 Nova is a distributed, asynchronous system that is prone to race condition
@@ -10,7 +10,7 @@
 
 Environment
 ------------
-This particular framework assumes your working Nova cluster understands Nova 
+This particular framework assumes your working Nova cluster understands Nova
 API 2.0. The stress tests can read the logs from the cluster. To enable this
 you have to provide the hostname to call 'nova-manage' and
 the private key and user name for ssh to the cluster in the