Major performance improvements to the Dashboard and Calendar views

* Close the PHP session for writing as early as possible in most AJAX
  calls for those views
* Reduce the number of roundtrips to the server in both the Dashboard
  and Calendar views by putting the data in our HTML response (this
  makes a massive difference)
* Eliminated a couple of unneccessary AJAX calls
* Use lazy loading in full calendar
* Fixed a bug in the week view that only occurs near the end of the
  week (date->gmdate bug!)

airtime_mvc/application/controllers/LibraryController.php

@@ -403,6 +403,7 @@ class LibraryController extends Zend_Controller_Action
 
     public function contentsFeedAction()
     {
+        session_write_close();
         $params = $this->getRequest()->getParams();
 
         # terrible name for the method below. it does not only search files.

airtime_mvc/application/controllers/ScheduleController.php

@@ -50,6 +50,13 @@ class ScheduleController extends Zend_Controller_Action
 
         $baseUrl = Application_Common_OsPath::getBaseDir();
 
+        $foo = new ScheduleController($this->getRequest(), $this->getResponse());
+        $foo->eventFeedPreloadAction();
+        //$foo->eventFeedAction();
+        $events = json_encode($foo->view->events);
+        //$timescale =
+            //$this->getRequest()->getParam("view", "week");
+
         $this->view->headScript()->appendScript(
             "var calendarPref = {};\n".
             "calendarPref.weekStart = ".Application_Model_Preference::GetWeekStartDay().";\n".
@@ -58,7 +65,7 @@ class ScheduleController extends Zend_Controller_Action
             "calendarPref.timeScale = '".Application_Model_Preference::GetCalendarTimeScale()."';\n".
             "calendarPref.timeInterval = ".Application_Model_Preference::GetCalendarTimeInterval().";\n".
             "calendarPref.weekStartDay = ".Application_Model_Preference::GetWeekStartDay().";\n".
-            "var calendarEvents = null;"
+            "var calendarEvents = $events;"
         );
 
         $this->view->headScript()->appendFile($baseUrl.'js/contextmenu/jquery.contextMenu.js?'.$CC_CONFIG['airtime_version'],'text/javascript');
@@ -116,6 +123,7 @@ class ScheduleController extends Zend_Controller_Action
 
     public function eventFeedAction()
     {
+        session_write_close();
         $service_user = new Application_Service_UserService();
         $currentUser = $service_user->getCurrentUser();
 
@@ -137,6 +145,7 @@ class ScheduleController extends Zend_Controller_Action
         $userInfo = Zend_Auth::getInstance()->getStorage()->read();
         $user = new Application_Model_User($userInfo->id);
         $editable = $user->isUserType(array(UTYPE_SUPERADMIN, UTYPE_ADMIN, UTYPE_PROGRAM_MANAGER));
+        session_write_close();
 
         $calendar_interval = Application_Model_Preference::GetCalendarTimeScale();
         if ($calendar_interval == "agendaDay") {
@@ -155,6 +164,7 @@ class ScheduleController extends Zend_Controller_Action
 
     public function getCurrentShowAction()
     {
+        session_write_close();
         $currentShow = Application_Model_Show::getCurrentShow();
         if (!empty($currentShow)) {
             $this->view->si_id = $currentShow[0]["instance_id"];
@@ -296,6 +306,7 @@ class ScheduleController extends Zend_Controller_Action
 
     public function getCurrentPlaylistAction()
     {
+        session_write_close();
         $range = Application_Model_Schedule::GetPlayOrderRangeOld();
         $show = Application_Model_Show::getCurrentShow();
 
@@ -704,6 +715,7 @@ class ScheduleController extends Zend_Controller_Action
      */
     public function setTimeScaleAction()
     {
+        session_write_close();
         Application_Model_Preference::SetCalendarTimeScale($this->_getParam('timeScale'));
     }
 

airtime_mvc/application/controllers/ShowbuilderController.php

@@ -246,6 +246,7 @@ class ShowbuilderController extends Zend_Controller_Action
     
     public function checkBuilderFeedAction()
     {
+        session_write_close();
         $request = $this->getRequest();
         $show_filter = intval($request->getParam("showFilter", 0));
         $my_shows = intval($request->getParam("myShows", 0));
@@ -265,6 +266,7 @@ class ShowbuilderController extends Zend_Controller_Action
 
     public function builderFeedAction()
     {
+        session_write_close();
     	$current_time = time();
     	
         $request = $this->getRequest();

airtime_mvc/application/controllers/UsersettingsController.php

@@ -37,6 +37,7 @@ class UsersettingsController extends Zend_Controller_Action
 
     public function setLibraryDatatableAction()
     {
+        session_write_close();
         $request = $this->getRequest();
         $settings = $request->getParam("settings");
 
@@ -45,6 +46,7 @@ class UsersettingsController extends Zend_Controller_Action
 
     public function getLibraryDatatableAction()
     {
+        session_write_close();
         $data = Application_Model_Preference::getCurrentLibraryTableSetting();
         if (!is_null($data)) {
             $this->view->settings = $data;
@@ -53,6 +55,7 @@ class UsersettingsController extends Zend_Controller_Action
 
     public function setTimelineDatatableAction()
     {
+        session_write_close();
         $request = $this->getRequest();
         $settings = $request->getParam("settings");
 
@@ -61,17 +64,11 @@ class UsersettingsController extends Zend_Controller_Action
 
     public function getTimelineDatatableAction()
     {
-        $start = microtime(true);
-
+        session_write_close();
         $data = Application_Model_Preference::getTimelineDatatableSetting();
         if (!is_null($data)) {
             $this->view->settings = $data;
         }
-
-        $end = microtime(true);
-
-        Logging::debug("getting timeline datatables info took:");
-        Logging::debug(floatval($end) - floatval($start));
     }
 
     public function remindmeAction()