Implemented the PedestrianStateProcessor

PedestrianStateProcessor adds a column "state" to the output with the
state of a pedestrian.

The possible states are:
 - c = Pedestrian was created
 - m = Pedestrian has moved
 - d = Pedestrian was deleted (has reached its final target)
 
The state is needed for the UQ simulations.

See merge request !14

PedestrianStateProcessor adds a column "state" to the output with the
state of a pedestrian.

The possible states are:
 - c = Pedestrian was created
 - m = Pedestrian has moved
 - d = Pedestrian was deleted (has reached its final target)
 
The state is needed for the UQ simulations.

If timestamp option in json is set to false, no timestamp is written in the output's folder name.

This floor field processor is independent of the discretization method and has a different output structure than the (old) floor field (grid) processor.

Values are not added always, they are also changed.

It testet for a normal resource file, but unit tests have a different
resource folder. So this cannot be testet.

Update PedestrianEvacuationTimeProcessor manually in EvacuationTimeProcessor since you cannot assume that the PedestrianEvacuationTimeProcessor gets updated automatically.

Before this, models had to periodically check (in update()) if a agent
reached its target. With this, models can register a target listener.
The listener are called by the target controller. The implementation can
change the model state.

To prevent MigrationManager from upgrading