Switch to side-by-side view

--- a/website/release-history.html
+++ b/website/release-history.html
@@ -36,6 +36,9 @@
 			<li>Bison-based query parser replaces old regexp-based
 			  one and allows parenthized sub-expressions and easier
 			  future expansions.</li>
+                        <li>Avoid retrying to index previously
+                          indexed files if nothing seems to have
+                          changed in the filters.</li>
 		  </ul>
 		</dd>
 		<dt><a href="release-1.20.html">Release 1.20</a>: small