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.h

@@ -33,7 +33,7 @@ public:
 	ImageView(QWidget * parent = 0);
 	~ImageView();
 
-	void setImage(const QImage & i);
+	void setImage(const QImage & i, bool save = true);
 	void setImage(const QByteArray & i);
 	QByteArray image() const {return im_data;}
 	QPixmap pixmap() const;