Inital release

This is the QFA library in the state that was described in our article:

@article{lippa2020simulations,
  title={Simulations of Quantum Finite Automata.},
  author={Lippa, G and Makie{\l}a, K and Kuta, M},
  journal={Computational Science--ICCS 2020},
  volume={12142},
  pages={441--450},
  year={2020}
}