updated thread handling:

- threads are no longer pooled (this makes naming threads difficult)
- threads are now named by their causing event, which improves logging

updated calls to thread.sleep: those are now provided by new class Delayed Execution

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

@@ -11,7 +11,7 @@ public class SavePlan extends Action{
 	}
 
 	@Override
-	public boolean fire(Context context) {
+	public boolean fire(Context context,Object cause) {
 		try {
 			plan.stream(plan.save());
 		} catch (IOException e) {