Fixed bug in WayPropertySet that ignored maxspeed tags
OpenStreetMapGraphBuilderImpl now looks for traffic_signals tags, sets
IntersectionVertex.trafficLight accordingly. IntersectionVertex does not
allow freeFlowing hack if trafficLight is set.
Added a WayPropertySetSource for Canadian road speeds.
Fixed an oddity which treated car weights like walking weights rather
than actual driving time.
Gave VizGui a car check box.