correct citation for Sepal

Dear Marcos

Sorry for the long delay. We have been discussing amongst ourselves the best way to cite the software. For the moment the below will work as a citation:

@misc{SEPAL 2020, author = {FAO}, title = {SEPAL}, year = {2020}, publisher = {GitHub}, journal = {GitHub repository}, howpublished = {\url{https://github.com/openforis/sepal}}, commit = {074f4c2913c02b43d2bbe908a0b751e2b4dd0052} }

We are ultimately working towards having a DOI, etc.

Hope that is helpful.

Erik