Run transit trips from plans through R5

[zneedell]

For the NYC project, we need a way of simulating what transit routes individuals are taking even through we don't want to bother running them through a full agentsim loop.

As an input, we will have access to plans, with the location and end time of every activity and the mode of every leg. We want to take every transit leg in these plans, determine departure time and origin from the previous activity, determine destination from the next activity, and run that trip through the R5 router.

As an output, we want to know detailed route information: every transit vehicle on the trip, and where/when the traveler enters and exits each vehicle.