String.format uses locale so 1.0 and 1,0 is different.

Add new online and offline visualization button to toggle
group view for pedestrians.

Pedestrians which are hold within a Model (List, Queue) must be deleted,
if they are consumed by a target. For the group model the listeners were
moved to the CentroidGroupModel (from the CentroidGroupFactory) to allow
one factory per source.

In "pom.xml" files, added "failIfNoTests" to avoid that module is (wrongly) marked as error if no tests were executed.

Otherwise, a module is flagged as error if no unit tests were executed at all.