Pretty faces for notebook authors

[CommonClimate]

Our current model for author contributions comes from EarthCube, and let's just say it's not optimal:

Alexander James, Department of Earth Sciences, University of Southern California

Author = {"name": "Alexander James", "affiliation": "Department of Earth Sciences, University of Southern California", "email": "akjames@usc.edu", "orcid": "0000-0001-8561-3188"} 

Julien Emile-Geay, Department of Earth Sciences, University of Southern California 

Author = {"name": "Julien Emile-Geay", "affiliation": "Department of Earth Sciences, University of Southern California", "email": "julieneg@usc.edu", "orcid": "0000-0001-5920-4751"}

On the other hand, it's possible to have our pretty avatars on there, as in Jordan's paleobook repo.

I suggest we do this for all the notebooks in this repo. @jordanplanders would it take you long?

[khider]

Need to make it consistent