Create 2021-01-ATPESC.md (#680)
Create 2021-01-ATPESC.md (#680)

* Create 2021-01-ATPESC.md

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Updates to wording, dates, etc.
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Co-authored-by: Lois Curfman McInnes <15da8cf18e2e6ea9e50ba1a86feb8ad0ea8b5261@mcs.anl.gov>
betterscientificsoftware/betterscientificsoftware.github.io