Added folder howto/ for capturing simple cookbook topics
Fixed a few silly trailing whitespace typos.

Change-Id: Id14c19477299d1c76f2c0227e4dc0882f6721e0f
diff --git a/index.rst b/index.rst
index bf901a2..7680525 100644
--- a/index.rst
+++ b/index.rst
@@ -202,3 +202,9 @@
    :glob:
 
    release_notes/*
+
+.. toctree::
+   :maxdepth: 2
+   :caption: HOWTO Topics
+
+   howto/edit_voltha_docs