Cache Data Example

Implement the `v2/summary` endpoint

Fixes #177

This endpoint does exactly the same calculation as the `v2/route`
endpoint. Only the result converter is changed.

The ResultToV2SummaryResponse converter takes the routing result and
creates the json response with the details for each line used. It also
calculates the number of times a line is encountered in an alternative.

faster calculations with reverse optimization

0.9.1

reverse calculation with all stops results and od trips

0.9.0

CSA Algorithm is working and almost all parameters are included.
Trip-Based Algorithm is unstable, but working with limited set of parameters.