These reaction rates are in the JINA Reaclib format and were downloaded
from the Reaclib website:

https://groups.nscl.msu.edu/jina/reaclib/db/



These reaction rates are in the JINA Reaclib 1 format and were downloaded
from the Reaclib website:

https://groups.nscl.msu.edu/jina/reaclib/db/

To add additional rates, download rates from the JINA Reaclib website
in the Reaclib 1 file format to either this library directory or your
problem directory.

At present, `pynucastro` does not support the Reaclib 2 file format.

Clarify that we support only Reaclib 1 file formats for rates.
Clarify that we support only Reaclib 1 file formats for rates.
