Sponsors and Contributors section of the README

[alxmrs]

• Pramod Gupta and the Anthromet Team at Google Research for the problem formation and design inspiration.
• Jake Wall and AI2/Ecoscope for compute resources and motivation (key use case).
• Charles Stern, Stephan Hoyer, and Qiusheng Wu for the early review and discussion of this project.

[alxmrs]

Missing two key collaborators:

• Alexander Kmoch
• Wei Ji