Add Acknowledgements section (#298)

index.html

@@ -2088,6 +2088,16 @@ <h2 id="validation-algorithms">Validation Algorithm</h2>
         invalid.
     </p>
 </section>
+
+  <section class="appendix informative">
+    <h2>Acknowledgements</h2>
+
+    <p>
+The Working Group thanks Orie Steele for his substantive intellectual and content
+contributions to this specification.  It wouldn't be the same without them.
+    </p>
+  </section>
+
 </body>
 
 </html>