Add notes list and integrate into templates

New partial templates/notes-list.html to render the notes list.
Add .notes-list CSS for styling and ensure contents areas use it.
Refactor site.hs: add loadNoteLinks and provide a "notes" listField
used by index and note pages.

templates/note.html

@@ -11,6 +11,7 @@ $partial("templates/head.html")$
                 that are big enough -->
         <div id="contents-big">
             <p class="mini-header">Notes <a id="up-arrow" href="/">←</a></p>
+            $partial("templates/notes-list.html")$
             <p class="mini-header">Contents <a id="up-arrow" href="#">↑</a></p>
             $toc$
         </div>
@@ -38,4 +39,4 @@ $partial("templates/head.html")$
     </div>
 </body>
 
-</html>
+</html>

templates/notes-list.html

@@ -0,0 +1,7 @@
+<ul class="notes-list">
+    $for(notes)$
+    <li>
+        <a href="$url$">$title$</a>
+    </li>
+    $endfor$
+</ul>

templates/notes.html

@@ -1,8 +1,2 @@
 <h1 class="pagetitle">$title$</h1>
-<ul>
-    $for(posts)$
-    <li>
-        <a href="$url$">$title$</a>
-    </li>
-    $endfor$
-</ul>
+$partial("templates/notes-list.html")$