Merge pull request #104 in VECTO/vecto-sim from...

Merge pull request #104 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-179-refactor-input-data-handling-to to develop

* commit 'd10a9057':
  adding friend assemblies
  make test compile
  adding common properties for every powertrain component for declaration to base-class
  refactoring component data: axlegear is now a full component, axle/wheels is now a full component
  refactoring report writing.
  new axletype enum, ctor documentation,
  gearbox fullload curve has only two columns
  adding 'make and model' to further components