huge commit, sorry!

this is part 1 of the UI makeover. It has:
- menu system from Matt integrated
- buttons drawing from Matt
- generic button panel system implemented
- converted displaybuttons (not the rest yet)
- cleaned up a lot in drawing spaces itself, to make it aligned and pixel exact.
- cleaned loads of little compiler warnings, protos...

still a lot of work needed, will all be in next week i hope!

(warn: 2 new c files! butspace.c and buttons_scene.c)

source/blender/src/drawoops.c

@@ -426,11 +426,12 @@ void drawoopsspace(ScrArea *sa, void *spacedata)
 	mywinset(curarea->win);
 
 	
+	/* ortho at pixel level curarea */
+	myortho2(-0.5, sa->winx-0.5, -0.5, sa->winy-0.5);
 	if(G.v2d->scroll) {	
-		/* ortho at pixel level curarea */
-		myortho2(-0.5, curarea->winx+0.5, -0.5, curarea->winy+0.5);
 		drawscroll(0);		
 	}
+	draw_area_emboss(sa);	
 	
 	uiDrawBlock(block);