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.

There is a 1:1 Relation ship between DataKeys and OutputFiles. This Mapping is introduced into the OutputFileClass Annotation to create the mapping wihtin the OutputFileBaseFactory.  

In "pom.xml" of "VadereGui", "VadereSimultor", "VadereState" and "VadereUtils", use version 2.19 of Surefire plugin to be able to skip tests via CLI.

Version 2.19 or higher of Surefire plugin allows to use following notation to skip tests:

  mvn test -Dtest=!LegacyTest

Note: maybe, use "mvn test -Dtest=\!LegacyTest" (with escape character) to avoid shell interpretation of exlemation mark.

Add Unit Test to Processors

See merge request !25

# Conflicts:
#   .gitignore

Show illegal entry by changing color to red. It is still possible to
click OK even if the input is invalid. The invalid input will be ignored
without an error is thrown.

New toolbar button with modal dialog to change width and size of
topography from the topography creator window.
Todo: new icon for resize action
Todo: Scenario Pane is not marked as changed (asterisk on scenario name)
Todo: Message Dialog for wrong syntax
Todo: allow comma an decimal point

The ScenarioPanel recreates the TopograpyWindow (view) each time a new
selection on the left is triggered. Within the recreation a new thread
recreated the view but was not synchronized to accept a
ChangeViewPortEvent for resizing.

The PostvisualizationWindow had the same issue.

update VadereConsole: delete unused arguements and add an output-dir arguement, maven will now generate a vadere-console.jar which can be executed via console.

Added Test for Processor. ToDo The Voroni Algorithm does not work
for the corner case if all Pedestrian (more than 2) ar collinear. This
is not really a problem because this case is rare.