Benjamin Beichler authored Sep 14, 2021 and Benjamin Beichler committed Sep 16, 2021

- now use pcg prng engine(https://www.pcg-random.org/

), since it is faster, has nice static characteristics and is easier to init (only a single 64bit number with no requirements, mt19937 needs 2k of initial state, which is generated std::seed_seq, but this can cause problems)
- add an CLI Parameter to set the seed (previously, only possible at compile and not at runtime)
- reworked the app4mcsim_seed drastically to remove the ridiculusly complicated legacy code
- use random_device for seed correctly on any platform, if no seed was given by cli

Signed-off-by: Benjamin Beichler <Benjamin.Beichler@uni-rostock.de>