update the AttributeAgents values to the values in weidmann-1993 and seitz-2016c for all model test scenarios.

implementation and performance testing of the SFMM. Stride information in pedestrianOSM will now be cleared to avoid large linked lists.

implementation and performance testing of the SFMM. Stride information in pedestrianOSM will now be cleared to avoid large linked lists.

add feature: it is now possible to display the target potential field of a specific agent if the main model is a potential field model.

update migration assistent such that one can choose from based on which version a project should be reimigrated.

add migration incident to delete an element inside an array, improve the code of the Graph/Tree-class