Make directional edges possible

[RiesBen]

For some FE ptorocols, it could make a difference, in which direction edges develop, therefore we should check if it is possible to build directed graphs with Konnektor, and if we could provide functionality in order to make things directional.
Thoughts:

• Usually this is mapper and scorer depended, we just need to check, that we are not killing that directionality in network planning.
• A tool making mappings and scores directional would be cool - make_directional(network_planner, network)->network. which enusres componentA -> componentB and componentB -> componentA are present or builds them.