Update 2020-02-25 CoDA Santa Fe, NM Conference on Data Analysis/qr-code.png,...

Greulich, Christopherrequested to merge
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Update 2020-02-25 CoDA Santa Fe, NM Conference on Data Analysis/qr-code.png, 2020-02-25 CoDA Santa Fe, NM Conference on Data Analysis/qr-code.svg files

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