Citing treefarm

If you use treefarm in your work, for now please cite the ytree package:

Britton Smith, & Meagan Lang. (2018, February 16). ytree: merger-tree toolkit. Zenodo. http://doi.org/10.5281/zenodo.1174374

For BibTeX users:

@misc{britton_smith_2018_1174374,
  author       = {Britton Smith and
                  Meagan Lang},
  title        = {ytree: merger-tree toolkit},
  month        = feb,
  year         = 2018,
  doi          = {10.5281/zenodo.1174374},
  url          = {https://doi.org/10.5281/zenodo.1174374}
}

If possible, please also add a footnote pointing to https://treefarm.readthedocs.io.