valhalla/baldr — pull request #21 by dnesbitt61 (2014-12-29 21:56:16+00:00)
Title: Add opposing edge index. This is the index into the edges at the end nod...

This is the index into the edges at the end node of the current directed edge that represents the opposing directed edge back to the start node of the current directed edge.

@kevinkreiser @dgearhart @gknisely