Datamodel structure refactor #23
Description
Initially the simulator had support for concurrent informs but that has been removed, now only one inform is allowed at a time. This means that datamodel access has become single threaded and doesn't require mutexes to protect the underlying map from concurrent writes.
Also I need to reconsider what fields belong to the Datamodel and which should be moved to the State. Does it still make sense to have both structures? Need to find out.