- converted constraint buttons, they're a Panel in Object main menu

- converted sound buttons, part of Scene
- special request Matt: headers of windows 2 pixels higher! (test)
- special request Stefano: icons instead of menu for buttons-header
- 'data browse' buttons now almost all in buttonswindow.
- almost all buttons have been panelized now.

next stage: cleaning up usage of color in Blender, to allow presests!

source/blender/include/butspace.h

@@ -56,10 +56,12 @@ extern void render_panels(void);
 extern void do_render_panels(unsigned short event);
 extern void anim_panels(void);
 extern void sound_panels(void);
+extern void do_soundbuts(unsigned short event);
 
 /* object */
 extern void object_panels(void);
 extern void do_object_panels(unsigned short event);
+extern void do_constraintbuts(unsigned short event);
 
 
 /* editing */