deleting lots of unused code from playground.
make it (hopefully) work again with events read from file.
adding note.
starting to put everything together...
calculation of sampling correction for stochastic choice set generation
Remove agent Id threshold. Only consider activity type 'minor'.
call QueueVehicle.setLinkEnterTime() when vehicle is added to an originalLane.
fix population generation in demo.
QueueVehicle can now store the linkEnterTime.
