Audio latency cleanup

Pull out contributors to latency from the main latency article.
Replace the body of main latency article by a table of resources.
Re-order all latency measurement pages to be adjacent.
Fix typo in page title: Audio Loopback Dongle.

Change-Id: Ibf94d0d724af2b4445736ad2c55d99efe66a81ea
diff --git a/src/devices/devices_toc.cs b/src/devices/devices_toc.cs
index f8a5890..90404a4 100644
--- a/src/devices/devices_toc.cs
+++ b/src/devices/devices_toc.cs
@@ -40,10 +40,11 @@
               </a>
             </div>
             <ul>
-              <li><a href="<?cs var:toroot ?>devices/audio/latency_measure.html">Measure</a></li>
+              <li><a href="<?cs var:toroot ?>devices/audio/latency_contrib.html">Contributors</a></li>
               <li><a href="<?cs var:toroot ?>devices/audio/latency_design.html">Design</a></li>
+              <li><a href="<?cs var:toroot ?>devices/audio/latency_measure.html">Measure</a></li>
               <li><a href="<?cs var:toroot ?>devices/audio/testing_circuit.html">Light Testing Circuit</a></li>
-              <li><a href="<?cs var:toroot ?>devices/audio/loopback.html">Loopback Audio Dongle</a></li>
+              <li><a href="<?cs var:toroot ?>devices/audio/loopback.html">Audio Loopback Dongle</a></li>
             </ul>
           </li>
           <li><a href="<?cs var:toroot ?>devices/audio/avoiding_pi.html">Priority Inversion</a></li>