GGIR use case 1#14

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eriktks wants to merge 5 commits intomainfrom

21-ggir-use-case-1

Commits on Mar 31, 2021

first attempt
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Commits on Apr 1, 2021

built signal and plot
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Commits on Apr 6, 2021

Commits on Apr 7, 2021

introduced person profile
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