version 2.4.0

ImageView now optionally save QImage when setImage()
piqt many stream operatorsand new helpers:
 * qSerialize
 * qDeserialize
 * piqSerialize
 * piqDeserialize

libs/widgets/image_view.cpp

@@ -40,16 +40,18 @@ void ImageView::setPixmap(QPixmap pixmap) {
 }
 
 
-void ImageView::setImage(const QImage & i) {
+void ImageView::setImage(const QImage & i, bool save) {
 	im_data.clear();
 	if (i.isNull()) {
 		item.setPixmap(QPixmap());
 		map = QPixmap();
 		return;
 	}
-	QBuffer b(&im_data); b.open(QIODevice::ReadWrite);
-	i.save(&b, "png");
-	b.close();
+	if (save) {
+		QBuffer b(&im_data); b.open(QIODevice::ReadWrite);
+		i.save(&b, "png");
+		b.close();
+	}
 	map = QPixmap::fromImage(i);
 	adjustView();
 }