CC-1894: Warn users about time zone differences or clock drift problems on the server

-An error msg now appears in pypo log when pypo and server timezones do not match

application/models/Schedule.php

@@ -716,6 +716,7 @@ class Schedule {
         $result['stream_metadata'] = array();
         $result['stream_metadata']['format'] = Application_Model_Preference::GetStreamLabelFormat();
         $result['stream_metadata']['station_name'] = Application_Model_Preference::GetStationName();
+        $result['server_timezone'] = date_default_timezone_get();
 
         return $result;
     }