cleaned up the build process to remove all remains from the old gtk-doc

* doc/Makefile.am doc/*.xsl doc/*.html doc/apibuild.py: cleaned up
  the build process to remove all remains from the old gtk-doc
  inherited, libxml2-refs.xml is now generated by apibuild.py, the
  stylesheets have been improved, and the API*html now generated
  are XHTML1 valid too
Daniel
diff --git a/doc/index.html b/doc/index.html
index 9cce9f6..88d340c 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -19,22 +19,22 @@
       <tr>
         <td width="120">
           <a href="http://swpat.ffii.org/">
-            <img src="../epatents.png" alt="Action against software patents" />
+            <img src="epatents.png" alt="Action against software patents" />
           </a>
         </td>
         <td width="180">
           <a href="http://www.gnome.org/">
-            <img src="../gnome2.png" alt="Gnome2 Logo" />
+            <img src="gnome2.png" alt="Gnome2 Logo" />
           </a>
           <a href="http://www.w3.org/Status">
-            <img src="../w3c.png" alt="W3C Logo" />
+            <img src="w3c.png" alt="W3C Logo" />
           </a>
           <a href="http://www.redhat.com/">
-            <img src="../redhat.gif" alt="Red Hat Logo" />
+            <img src="redhat.gif" alt="Red Hat Logo" />
           </a>
           <div align="left">
             <a href="http://xmlsoft.org/">
-              <img src="../Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" />
+              <img src="Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" />
             </a>
           </div>
         </td>
@@ -129,6 +129,9 @@
                                 <a href="examples/index.html" style="font-weight:bold">Code Examples</a>
                               </li>
                               <li>
+                                <a href="html/index.html" style="font-weight:bold">API Menu</a>
+                              </li>
+                              <li>
                                 <a href="guidelines.html">XML Guidelines</a>
                               </li>
                             </ul>