valhalla/thor — pull request #9 by dnesbitt61 (2014-12-31 13:45:37+00:00)
Title: Uturns

Add Uturn to costing (so we can disallow where needed).
Add opposing edge index to EdgeLabels so we can detect Uturns. May also be needed for turn costing later.

@dgearhart @gknisely @kevinkreiser