Add visualization of story dependencies

[mavam]

We use story relationships (blocks and is blocked by) to express dependencies. It would be tremendously useful to visualize these relationships in a DAG, as this would show the critical path. Knowing which story is a head-of-line blocker helps understanding where to channel efforts for maximum productivity.

A visualization in the form of a DAG makes this obvious: the node with the highest in-degree represents the story with the most bang for the buck.

Have you considered such an enhancement?