integrate QC plugin (ajax branch)

This refactors the page-attribute area a bit and intergrates the new
ajax branch of the QC plugin. I'm not really happy about the included
file - it should probably be moved to our Template class instead.

js/plugins/qc.js

@@ -0,0 +1,37 @@
+/**
+ * Add custom QC functionality instead of using the plugin's mechanism
+ */
+jQuery(function () {
+    var $panel = jQuery('div.qc-output').hide();
+
+    // load summary
+    jQuery('.page-attributes .plugin_qc a').load(
+        DOKU_BASE + '/lib/exe/ajax.php',
+        {
+            call: 'plugin_qc_short',
+            id: JSINFO['id']
+        },
+        function () {
+            jQuery(this).find('span span').addClass('num');
+        }
+    ).click(function (e) {
+        e.preventDefault();
+
+        if ($panel.html() == '') {
+            // load output
+            $panel.load(
+                DOKU_BASE + '/lib/exe/ajax.php',
+                {
+                    call: 'plugin_qc_long',
+                    id: JSINFO['id']
+                },
+                function () {
+                    $panel.dw_show();
+                }
+            );
+        } else {
+            $panel.dw_toggle();
+        }
+    });
+
+});