Added cmd line arguments --eventParameters, --runNumberOffset and --eventNumberOffset to steer lcio output parameters

Adding the helper to allow reading an MCParticle collection with an arbitrary name

whitespace to emulate the output from DD4hep
Solves #56

  - to activate run ddsim with:
     --part.enableDetailedHitsAndParticleInfo

 - add option to enable debug output actions for hits from Markus

Add Helper Input and GuineaPig for further expansions in the future

Set on the command line with

   --guineapig.particlesPerEvent=123

or in the steering file

   SIM.guineapig.particlesPerEvent=123

This reverts commit 70feca4742a0721bdbe7197de1a33eb878a63799.

as we are now potentially changing the random seed we need to initialize it before the output file, because we write the variables to the outputfile at this point