Can we have a label instead of arrow/circle to the ends of edges?

[ptanmay]

As of now, the ends of edges can only be arrows or circles. Can you add a feature that allows us to choose to put labels at the ends of edges instead of the shapes?

[cdjackson]

This is an issue for the main library - the angular directive is only a thin wrapper so I'd suggest to make the request in the vis issue tracker.