Added styles and js for disablling next and prev buttons

--HG--
branch : kf-sequence-nav

seq_module.html

@@ -6,10 +6,17 @@
   </ol>
 
   <ul>
-    <li id="${ id }prev" class="prev">Previous</li>
-    <li id="${ id }next" class="next">Next</li>
+    <li class="${ id }prev prev"><a href="#">Previous</a></li>
+    <li class="${ id }next next"><a href="#">Next</a></li>
   </ul>
 </nav>
 
 <div id="seq_content"></div>
 
+<nav class="sequence-bottom">
+<ul>
+  <li class="${ id }prev prev"><a href="#">Previous</a></li>
+  <li class="${ id }next next"><a href="#">Next</a></li>
+</ul>
+</nav>
+