Merge pull request #373 in VECTO/vecto-sim from develop to master

* commit '0dad3383':
  adapt result file: added new columns
  add new columns to vsum, adapt testdata
  gearbox: do no reduce engage time if it is already set
  reduce velocity for disengaging to 10km/h
  set _lastenginePower in case it has not been set (switching from double-clutch to idle while disengaged
  shift polygon test: write shift polygon points
  adapt testcase: fill required field
  correction of shift strategy (AM) - skip gears
  reduce min. time between gearshifts to 1.5s (declaration mode)
  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)