Gets a collection of EXIF fields of a file.
$au.imageUploaderFlash('uploaderID').files().get(index).exif(callback);
Type: Function
A function which is called when the EXIF is extracted. It accepts the Object containing all EXIF fields.This method works asynchonously - you receive data through the callback you pass into this method. However if you are sure that the data is already available, you can use it synchronously. For example, you can do it after the upload has been started.