Switch to side-by-side view

--- a/website/release-history.html
+++ b/website/release-history.html
@@ -118,6 +118,29 @@
           </ul>
         </dd>
 
+        <dt><a href="release-1.16.html">Release 1.16</a>: small
+          improvements</dt> 
+        <dd>
+          <ul>
+            <li>Images displayed in preview window.</li>
+            <li>Save to file popup in preview.</li>
+            <li>Fields in advanced search.</li>
+            <li>Searches anchored to beginning or end of text.</li>
+            <li>Saving the result table to CSV.</li>
+            <li>Improved indentation in preview window.</li>
+          </ul>
+        </dd>
+
+        <dt><a href="release-1.15.html">Release 1.15</a>: results
+          table</dt> 
+        <dd>
+          <ul>
+            <li>Optional spreadsheet presentation of results.</li>
+            <li>Clear search history.</li>
+            <li>Better thunderbird mbox format handling.</li>
+          </ul>
+        </dd>
+
     </div>
   </body>
 </html>