Callback function that will be invoked when events are logged to the app log.
Log listeners can be added with AppLog.startLogListener.
<static> logListener( date, event, message )
| Name | Type | Description |
| date | Date | The date of the log entry. |
| event | number | The event ID of the log entry (will be one of the AppLog status events, or possibly a custom value). |
| message | string | The string carrying the message of the log entry. |