Started clean re-implementation of

- reserving route
- preparing route
- locking route

New implementation now properly handles stop event from user.

Next things to implement:

- tracing train upon contact activation, taking care of:
    - causing contact
    - train's last position
    - route
    - plan.freeBehindTrain
- finish event, keeping brake processor in mind

src/main/java/de/srsoftware/web4rail/actions/ActionList.java

@@ -81,12 +81,11 @@ public class ActionList extends Action implements Iterable<Action>{
 	}
 
 	public boolean fire(Context context,Object cause) {
-		if (context.invalidated()) {
-			LOG.debug("Context has been invalidated, aborting {}",this);
-			return false;
-		}
-		
 		for (Action action : actions) {
+			if (context.invalidated()) {
+				LOG.debug("Context has been invalidated, aborting {}",this);
+				return false;
+			}
 			LOG.debug("firing \"{}\"",action);
 			if (!action.fire(context,cause)) {
 				LOG.warn("{} failed",action);

src/main/java/de/srsoftware/web4rail/actions/CoupleTrain.java

@@ -29,7 +29,7 @@ public class CoupleTrain extends Action {
 		if (isNull(train)) return false;		
 		Block block = train.currentBlock();
 		if (isNull(block)) return false;
-		Train parkingTrain = block.parkedTrain(last);
+		Train parkingTrain = block.lastTrain();
 		if (isNull(parkingTrain)) return false;
 		train.coupleWith(parkingTrain,swap);
 		return true;