Support some Extended GTFS Route Types (graphhopper#1761)

Map extended GTFS route_type value to basic route_type, fixes graphhopper#1753

Adjust benchmark parameters

Update README.md

Update GHMRequest for curbside

Extract helper method in GHMatrixSyncRequester

Move path extraction logic out of `Path` class (graphhopper#1730)

* Remove PathBidirRef#switchFromTo
* Remove unnecessary statement in edge-based CH algo
* Remove unnecessary check in AlternativeRoute
* Use dedicated path extraction class for bidir algos
* Remove PathBidirRef and subclasses
* Make AStar more similar to Dijkstra
* Move path extraction for unidir algos into new PathExtractor
* Remove extract stuff from Path class

updated README.md

Fix integer overflow in PrepareContractionHierarchies

New MaxLengthParser (graphhopper#1703)

* Add maxlength profile

* Move shared value parsing logic into helper class

* Provide a parser for OSMs maxlength tag

* Merge value extraction helper classes

/spt endpoint fix wrong var name