Merge pull request #370 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:develop to develop

* commit 'a0f4bb7f':
  remove testcases with very high slope
  torque converter: introduce creeping flag; dry-run: return delta drag-load and delta full-load (don't guess what's required); set creeping flag accordingly
  adapt testcase for shift-losses
  driverStrategy: allow coasting (overspeed) only when vehicle speed > 0
  driver: do not limit deceleration when disengaged; search for acceleration if negative braking power occurs
  shift loss computation: compute shift loss energy, allow splitting into multiple simulation intervalls
  save test for cargo volume
  don't write sum-data if no sum-writer is set
  torque converter: compute both delta values on dry-run (full-load & drag load)