Many things in a single commit. Bad :( !. re #73

* Add partial update. No improvement for now
 * Add some logging to console if DEBUG is enabled.
 * Change the way the sorting box is enabled to help with partial update.

templates/default/header.html

@@ -22,8 +22,7 @@
                 </div>
             </form>
         </div>
-        {{? it.containsBook == 1}}
-        <div style="float: right; width: 35%">
+        <div id="sortForm" style="float: right; width: 35%; display: none">
             <div style="float: right">
                 <img id="sort" src="images/sort32.png?v={{=it.const.version}}" alt="{{=it.const.i18n.sortAlt}}" />
             </div>
@@ -40,6 +39,5 @@
                 </select> 
             </div>
         </div>
-        {{?}}
     </div>
 </header>