Add stay_in unittests.

Test in routing_api_test fails when it shouldn't... (?)
Test counter-clockwise vj-extension
Fix unit_test (no nex/prev vj without finish)
raptor_path don't add wait between two interling sections
Add more stay_in raptor_api unittests
Subtract amount of transfers at reconstruction vj_extension
Require VJ extensions to be direct
Add connections between teleport
Fix mistake
Fix very probably typo
Assert on reversal errors

If there are no solutions found at this point, a bug is present causing unsymetric searches in clockwise vs counterclockwise. If no paths exists, this assert will never be reached anyway after the invalid_idx check

--Do not merge as such a bug is present --
Add comment on reversal assert
Merge pull request #430 from bliksemlabs/reversal_trainingwheels

Assert on reversal errors
Merge pull request #427 from bliksemlabs/stay_in

Stay in fixes