fadeTo(): Fix img src to point to /resources/

Closes #274

Author: kswedberg

entries/fadeTo.xml

@@ -50,10 +50,10 @@
   });
   </code></pre>
     <p class="image four-across">
-      <img src="/images/0042_06_41.png" alt=""/>
-      <img src="/images/0042_06_42.png" alt=""/>
-      <img src="/images/0042_06_43.png" alt=""/>
-      <img src="/images/0042_06_44.png" alt=""/>
+      <img src="/resources/0042_06_41.png" alt=""/>
+      <img src="/resources/0042_06_42.png" alt=""/>
+      <img src="/resources/0042_06_43.png" alt=""/>
+      <img src="/resources/0042_06_44.png" alt=""/>
     </p>
     <p>With <code>duration</code> set to <code>0</code>, this method just changes the <code>opacity</code> CSS property, so <code>.fadeTo(0, opacity)</code> is the same as <code>.css('opacity', opacity)</code>.</p>
   </longdesc>