It should be possible to exclude edges from the bidirectionalArrows

[jdugan1024]

In the case of the facilities map, we would like to show the bidirectional arrows for the backbone and to the sites. However, since the facilities cluster around sites it would nice to be able to leave the simple edges for the links between sites and facilities.

Something like a prop called simpleEdges that would be a list of edges to just use the simple lines.