add conversion script and functions from cobidas checklist#5

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Remi-Gau wants to merge 2 commits intoReproNim:masterfrom

Remi-Gau:remi-conversion_script

Commits on Jul 18, 2020

add conversion script and functions from cobidas
Remi-Gau
committed

Commits on Sep 22, 2020

add classes to help with the creation protocol, activity and item schema
Remi-Gau
committed