add stand alone features from VadereManagement module:
- single step mode in GUI: Allows the user to step through the simulation one step at a time to identify bugs.
- simplify obstacles: Merge multiple obstacles based on the convex hull their points create. The merge can be undon
- add features to open street map (osm) importer:
- import 'open' paths as polygons with a specified width. With this it is possible to create walls or subway entrance
- add option to include osm ids into each obstacle