Merge pull request #481 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:develop to develop

* commit 'aa630858':
  Releasing VECTO 3.2.0
  update user manual
  update license header in new files
  release checlist
  update user manual
  more work on user manual
  updating screenshots for help
  adding vsum-files of several vehicles (comparison)
  updating documentation: xml schema of output
  updating user manual
  bugfix: hasing overwriting date
  fix writing json file
  adding vehicle height to generic vehicle
  fix: xml export, gearbox form: only allow export in declaration mode
  adding input field for vehicle height (required for declaration-mode cross-wind correction in engineering mode)
  adding changelog to release notes
  help: adding platform requirements
  updating changelog
  update Version numbers