Added new scenario element "AbsorbingArea" to package "org.vadere.state" and included it into GUI.
New scenario element "AbsorbingArea" is not handled in: - AbsorbingAreaController (this class is missing completely at the moment). - MigrationAssistant (must add node '"absorbingAreas" : [ ]' to topography tree). - DefaultConfig (to be able to change color). - TikzGenerator (must use "topography.getAbsorbingAreas()" to iterate over the new scenario element).