Child sims#30

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MBaczun wants to merge 4 commits intomasterfrom

Commits on Aug 4, 2020

Made basic Simulation tests
zedrox
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fixes coordinator tests
zedrox
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Commits on Aug 5, 2020

First implementation of child sims, inc. tests
zedrox
committed

Commits on Aug 10, 2020

Adds async simulation support and acks
zedrox
committed