Merge pull request #516 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-579-vecto-gui-crashes-null-reference to master

* commit '99023f22':
  declarationdataadapter: write wheels dimenstion string to axle data
  add validation of tyre dimension (declaration mode)
  check if a wheel dimension is selected

Merge pull request #515 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-577-vecto-export-xml-functionality to master

* commit '47cd4c72':
  avoid illegal characters in id attribute
  handle the case where the vehicle has no idling speed set

Merge pull request #513 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-575-vecto-simulation-aborts to master

* commit '435a6f87':
  remove double accounting of gearbox inertia loss during dry-run search

Merge pull request #511 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-573-units-for-distance-incorrect-in to master

* commit '954027d3':
  correct unit for distance in graph window

Merge pull request #508 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-571-customer-report-wrong-output-format to master

* commit 'ad3aed88':
  set format for RRC in customer report to 4 digits

Merge pull request #507 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-568-retarder-type-engine-retarder-not to master

* commit '10e181bb':
  handle engine retarder in factory and when building powertrain
  adding testcases for creating powertrain in declaration mode

Merge pull request #495 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-545-no-calculation-settings-in-engineering to master

* commit 'd89b228b':
  update help on engine dialog
  update help on settings dialog

* commit 'beb2cf3c':
  creating new version: 3.2.0.940
  amend/correct results of previous release

Merge pull request #492 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-548-online-user-manual to master

* commit 'b809e697':
  extending release checklist
  update js-function for checking internal links
  corrected dead links
  adding script to check dead internal links

Merge pull request #490 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-552-set-engine-rated-power-rated-speed to master

* commit '77fd308a':
  use FLD values if declared speed/power are 0

Merge pull request #489 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:bugfix/VECTO-551-average-tyre-rrc-not-in-customer to master

* commit '83968360':
  formatting xml output
  update resource file
  computing average rolling resistance
  adapt output schema to include AverageRRC
  move strings to resource, add averageRRC to customer report

Merge pull request #488 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-550-allow-custom-settings-for-airdensity to master

* commit 'c5b6c454':
  correct testcase

Merge pull request #487 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-550-allow-custom-settings-for-airdensity to master

* commit '6f091d62':
  add attributes to air density property: required
  adapt testcases related to airdrag: pass along air density; set air density in model data in testcases
  add air density (and gravity acceleration) as constant to declaration data. add air density to vehicle data, use air density from model data for air drag computation declaration data adapter: use declaration data; engineering data adapter: use physics constant to fill model data GUI: set air density (physical constant) in declaration mode

adapt testcases related to airdrag: pass along air density; set air density in model data in testcases