Added WIP support for affine transformations to BViews.

Everything untested, but compiles, so it must work. The idea is to introduce
BAffineTransform additionally to the existing Origin and Scale properties of
BViews. One may use it in parallel or as an alternative. Painter in app_server
is not yet aware of the additional transformation. It is however already used
to transform drawing coordinates. It probably needs to work differently,
perhaps only in Painter and AGGTextRenderer.

headers/private/app/ServerProtocolStructs.h

@@ -9,6 +9,7 @@
 #define APP_SERVER_PROTOCOL_STRUCTS_H
 
 
+#include <AffineTransform.h>
 #include <Rect.h>
 
 
@@ -21,6 +22,7 @@ struct ViewSetStateInfo {
 	drawing_mode				drawingMode;
 	BPoint						origin;
 	float						scale;
+	BAffineTransform			transform;
 	join_mode					lineJoin;
 	cap_mode					lineCap;
 	float						miterLimit;