Poll results performance from change_log.txt

Notes:  The wp_cron job will take over the calculation of the results if 5 seconds is not long enough at the time of form submission/update.
		The default schedule is set to hourly to avoid heavy loads on the server but the frequency can be changed by using the gform_polls_cron_schedule filter.
		The format follows the same format required by the WordPress cron_schedules filter. http://codex.wordpress.org/Function_Reference/wp_get_schedules

		** Important: the Polls Add-On must be deactivated and reactivated in order to reschedule the task.
Example usage:
	add_filter( 'gform_polls_cron_schedule', 'cron_add_twice_hourly' );
	function cron_add_twice_hourly() {
	  // Adds once weekly to the existing schedules.
	  $schedule['twicehourly'] = array(
		  'interval' => 1800, // number of seconds in the interval
		  'display' => __( 'Twice Hourly' )
	  );
	  return $schedule;
	}