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/release/repositories/voltha-onos/index.rst b/howto/release/repositories/voltha-onos/index.rst
index abef329..36f2956 100644
--- a/howto/release/repositories/voltha-onos/index.rst
+++ b/howto/release/repositories/voltha-onos/index.rst
@@ -4,4 +4,7 @@
 .. toctree::
    :maxdepth: 1
 
+   dependencies
+   release
    resources
+   todo