[media] doc-rst: backward compatibility with older Sphinx versions

Sphinx is really evil when an older version finds an extra
attribute for the :toctree: tag: it simply ignores everything
and produce documents without any chapter inside!

As we're now using tags available only on Sphinx 1.4.x, we
need to use some creative ways to add a title before the
table of contents. Do that by using a css class.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/Documentation/sphinx-static/theme_overrides.css b/Documentation/sphinx-static/theme_overrides.css
index c97d842..3a2ac4b 100644
--- a/Documentation/sphinx-static/theme_overrides.css
+++ b/Documentation/sphinx-static/theme_overrides.css
@@ -31,6 +31,11 @@
      *   - hide the permalink symbol as long as link is not hovered
      */
 
+    .toc-title {
+        font-size: 150%;
+	font-weight: bold;
+    }
+
     caption, .wy-table caption, .rst-content table.field-list caption {
         font-size: 100%;
     }