(svn r2962) - const correctness for all Get* functions and most Draw* functions that don't change their pointer parameters

- change a lot of byte player types to PlayerID
- beautify header files, same "#endif /* filename */" ending

order_gui.c

@@ -186,7 +186,7 @@ static void DrawOrdersWindow(Window *w)
 	}
 }
 
-static Order GetOrderCmdFromTile(Vehicle *v, TileIndex tile)
+static Order GetOrderCmdFromTile(const Vehicle *v, TileIndex tile)
 {
 	Order order;
 	Station *st;