CC-4904: Library -> Sort by status doesn't work

- added 2 columns to cc_files (is_scheduled, is_playlist)
- split library status column into two columns (scheduled, playlist)
- is_scheduled gets updated when a track plays out, or when a file gets added/removed from/to a show
- is_playlist gets updated when a file gets added/removed from/to a playlist/block, when a playlist/block gets deleted, or when a playlist/block's contents is cleared

airtime_mvc/application/controllers/ScheduleController.php

@@ -33,6 +33,7 @@ class ScheduleController extends Zend_Controller_Action
                     ->addActionContext('dj-edit-show', 'json')
                     ->addActionContext('calculate-duration', 'json')
                     ->addActionContext('get-current-show', 'json')
+                    ->addActionContext('update-future-is-scheduled', 'json')
                     ->initContext();
 
         $this->sched_sess = new Zend_Session_Namespace("schedule");
@@ -950,4 +951,11 @@ class ScheduleController extends Zend_Controller_Action
         echo Zend_Json::encode($result);
         exit();
     }
+
+    public function updateFutureIsScheduledAction()
+    {
+        $schedId = $this->_getParam('schedId');
+        $redrawLibTable = Application_Model_StoredFile::setIsScheduled($schedId, false);
+        $this->_helper->json->sendJson(json_encode(array("redrawLibTable" => $redrawLibTable)));
+    }
 }