Clean up docs issues

The Sphinx build produces a number of warnings and errors. Some are
rightfully ignored, but many need to be fixed. These are mostly
unindexed pages and misformatted references.

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I9d7a116dc87083ad2dcab20e31cd479364f298cd
diff --git a/howto/docs.voltha.org/quickstart.rst b/howto/docs.voltha.org/quickstart.rst
index 73096ee..e012f3a 100644
--- a/howto/docs.voltha.org/quickstart.rst
+++ b/howto/docs.voltha.org/quickstart.rst
@@ -48,12 +48,12 @@
 .. code-block:: shell-session
    :caption: Launch a browser for viewing local edits
    :linenos:
-   :emphasize-lines: 4
+   :emphasize-lines: 2
 
    cd voltha-docs
    make reload
 
-- source edit: modify reStructuredText (RST) sources
+- Source edit: modify reStructuredText (RST) sources
 - Modify content to taste
 
 Invoke checkin tests locally