add release notes

doc/index.shtml

@@ -7,6 +7,10 @@
       <ul>
 	<li> <A HREF="frame_file.html">TODO list</A>
       </ul>
+  <li><b>ZMap Release Notes</b>
+      <ul>
+	<li> <A HREF="Release_notes/index.shtml">2006</A>
+      </ul>
   <li><b>ZMap Coding and Design</b>
       <ul>
 	<li> <A HREF="coding_notes.html">Coding Style</A>
@@ -18,6 +22,7 @@
   <li><b>ZMap User Guides</b>
       <ul>
 	<li> <A HREF="user_guide.shtml">User Guide</A>
+	<li> <A HREF="user_interface.shtml">User Interface</A>
 	<li> <A HREF="resource_files.html">Resource Files</A>
       </ul>
   <li><b>FooCanvas</b>