KGMf benchmark

[micrenda]

And interesting paper for an interesting software:

Benchmark of the KGMf with a coupled Boltzmann equation solver. Computer Physics Communications
Krek, J., Fu, Y., Parsey, G. M. & Verboncoeur, J. P. 260, 107748 (2021) doi:10.1016/j.cpc.2020.1077481