Add arrival delay to departure delay to get accurate simulation on delayed trains

[findus]

As soon as a train departs from a station, all new datasets from hafas omit the prior station departure delays. That causes all future sections to be misaligned because the simulation thinks that passing the following section between 2 stops will take the "normal" time + the delay:

Dep (18:00)+50 -------> Arr (19:00)+50 = Travel time: 60 minutes
Omitted:
Dep (18:00) --------> Arr (19:00)+50 = Travel time: 1h 50minutes

Fix: Add the arrival delay to the departure delay.

[findus]

Tried to fix it with 1.3.3, now the first occuring delay gets "backported" to all prior stops.
Still need to find a way to get at least the "real" departure date from the latest station the train departed on, might switch or modify the backend for this.