Add new library to root index file.

index.html

@@ -55,8 +55,8 @@
 
   <h3>Changes in this release</h3>
 
-  <p>This release includes ??? new libraries
-  <!-- (<a href="libs/coroutine2/">Coroutine2</a>) -->,
+  <p>This release includes 1 new library
+  (<a href="libs/vmd/index.html">VMD</a>),
   as well as updates to many existing libraries. See
   <a href="http://www.boost.org/users/history/version_1_60_0.html">Release
   History</a> for more information.</p>