Add anchor ids to startOperation/endOperation docs

Author: marijnh

doc/manual.html

@@ -2048,8 +2048,8 @@ <h3 id="api_misc">Miscellaneous methods</h3>
       lot faster. The return value from this method will be the return
       value of your function.</dd>
 
-      <dt><code><strong>cm.startOperation</strong>()</code></dt>
-      <dt><code><strong>cm.endOperation</strong>()</code></dt>
+      <dt id="startOperation"><code><strong>cm.startOperation</strong>()</code></dt>
+      <dt id="endOperation"><code><strong>cm.endOperation</strong>()</code></dt>
       <dd>In normal circumstances, use the above <code>operation</code>
       method. But if you want to buffer operations happening asynchronously,
       or that can't all be wrapped in a callback function, you can