Minor doc fixes/improvements.

chrome/common/extensions/docs/static/themes.html

 <div id="pageData-showTOC" class="pageData">true</div>
 
 <p>
 A <em>theme</em> is a special kind of extension
 that changes the way the browser looks.
 Themes are <a href="packaging.html">packaged</a> like regular extensions,
 but they don't contain JavaScript or HTML code.
 </p>
 
 <p>
 You can find and try a bunch of themes at the
 <a href="https://tools.google.com/chrome/intl/en/themes/">themes gallery</a>.
 </p>
 
 <h2> Manifest </h2>
 <p>
-Here is an example <code>manifest.json</code> file for a theme:
+Here is an example
+<a href="manifest.html"><code>manifest.json</code></a>
+file for a theme:
+</p>
+
+<p class="comment">
+[PENDING: This page should eventually be (or point to) something
+that's very friendly to artists.
+You should only have to look at one page to create a theme.]
 </p>
 
 <pre>
 {
 &nbsp;&nbsp;"version": "2.6",
 &nbsp;&nbsp;"name": "camo theme",
 <b>&nbsp;&nbsp;"theme": {
 &nbsp;&nbsp; &nbsp;"<a href="#images">images</a>" : {
 &nbsp;&nbsp; &nbsp; &nbsp;"theme_frame" : "images/theme_frame_camo.png",
 &nbsp;&nbsp; &nbsp; &nbsp;"theme_frame_overlay" : "images/theme_frame_stripe.png",
@@ skipping 90 matching lines @@
     and 1 as <em>all pixels white</em>.
   </li>
 </ul>
 
 <p>
 You can alternatively use <code>-1.0</code> for any of the HSL values
 to specify <em>no change</em>.
 </p>