Add Road informations to the EndLocation Data Frame

[MarcLabb]

Issue name: Add Road informations to the EndLocation Data Frame

Summary

I propose to add road informations such as RoadName, Number and Direction to the EndLocation Data Frame.

Motivation

Because a common workzone could begin on a highway and ending on another road or highway, I think that this informations should be important to provide as well.
It is not clear that all the workzone is on the same road all along.

[j-d-b]

As of v2 the concept of a "data frame" no longer exists, but the idea behind this issue is still relevant. That is, the spec defines road_name, road_number, and direct on the road_event entity, but there is no way to specify if a road event starts and ends on a different roadway, and no clarification if those fields should represent the start or end roadway information.

[lynnerandolph]

TxDOT has this information as part of a lane closure or work zone which is a line event (larger than a point). There is a start location consisting of a lat/lon, roadway, direction, cross street and the end location has that same information.

[j-d-b]

See #78, which suggests creating a new road event if the roadway changes.

[j-d-b]

Closed in favor of #78.