Changes:

* Add UseFixedSeed (bool switch) and fixedSeed Attribute values
  This allows to rerun the simulation with different but fixed seeds
  for random numbers.
* Add simulationSeed to save currently used seed while simulation is
  running. This is useful to determine the seed used for processor
  outputs in the output directory.
* Add Test for new version and refactor code duplicates
* Change Hash calculation to exclude UseFixedSeed, fixedSeed and
  simulationSeed to highlight (green) output to selected scenario
  within the gui.