FileUploadBar fileUpload = new FileUploadBar("fileUpload");
add(fileUpload);
// The gallery that can be used to view the uploaded files
// Optional
FileUploadGallery preview = new FileUploadGallery("preview");
add(preview);
// The template used by jquery.fileupload-ui.js to show the files
// scheduled for upload (i.e. the added files).
// Optional