(svn r1525) -Codechange: rewrote the _order_array, now it can be made dynamic.

-Codechange: renamed all 'schedule' stuff to 'order(list)'
-Codechange: moved all order-stuff to order_cmd.c / order.h
-Codechange: vehicles that share orders are now linked to eachother
  with next_shared/prev_shared in Vehicle

  Developers: please use AssignOrder to assign data to an order. If not, 
   you _WILL_ make the save-routine to assert!

misc.c

@@ -150,6 +150,8 @@ void CSleep(int milliseconds)
 	#endif
 }
 
+void InitializeVehicles();
+void InitializeOrders();
 void InitializeClearLand();
 void InitializeRail();
 void InitializeRailGui();
@@ -206,7 +208,7 @@ void InitializeGame()
 	}
 
 	InitializeVehicles();
-	_backup_orders_tile = 0;
+	InitializeOrders();
 
 	InitNewsItemStructs();
 	InitializeLandscape();