(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!

saveload.h

@@ -70,11 +70,11 @@ typedef struct {
 extern SaverLoader _sl;
 
 enum {
-	REF_SCHEDULE = 0,
-	REF_VEHICLE = 1,
-	REF_STATION = 2,
-	REF_TOWN = 3,
-	REF_VEHICLE_OLD = 4,
+	REF_ORDER       = 0,
+	REF_VEHICLE     = 1,
+	REF_STATION     = 2,
+	REF_TOWN        = 3,
+	REF_VEHICLE_OLD = 4
 };