Adds a train station that will interrupt all attending trains, sending them to a temporary destination station before continuing their schedule.

Trains that stop at a diverter station will receive an order to travel to some other station before continuing their schedule. They may also optionally skip the wait condition for the diverter station in their schedule.

Trains need to actually stop at the diverter station for it to work. If a train drives past a diverter station without stopping, it will not receive diversion orders.

The user interface for configuring diverter stations is still a bit clunky and primitive. Hopefully the next major version will fix that.