* GEOM -> 3D enabled Z=0 default

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>
+ GUI.Tree & DAT transfer

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>
+CAD: autogen data
+GEOM: draw (callback from gui.paint) method
+GUI: project tree, geom drawing, scaling

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>