allow for vehroute-output to record calibrator-influenced routes

[namdre]

right now

• the full length of a route is written even if the vehicle was removed by a calibrator on an intermediate edge
• calibrator-inserted vehicles are written with a route that may start upstream of the calibrator rather than starting at the calibrator edge

There are different ways for solving this:

1. Truncate written routes of removed and inserted vehicles. This closely matches the behavior of the calibrated simulation but may cause unrealistic routes (e.g. starting and ending on the middle of a motorway)

• Filter removed vehicles from the vehroute-output
• Adapt the departure time of inserted vehicles so they can travel from their upstream insertion edge to the calibrator and arrive there at the time when they were originally inserted by the calibrator
• This avoids unrealistic routes but leads to inconsistencies when a vehicle interacts with more than 1 calibrator (e.g. a vehicle that is inserted at one calibrator and removed at another)

Both approaches could be made available via option. 1) should be easier to implement, have unambiguous results and thus should be the default.