Améliorations diverses du README.#1288

Merged

awecx merged 8 commits intopython:3.8from

awecx:contributing_misc4

May 16, 2020

Commits on May 3, 2020

Modifs mineures.
antoine
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Commits on May 12, 2020

Corrections mineures.
antoine
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Commits on May 13, 2020

Modifications diverses.
antoine
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Encore des modifs.
antoine
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Correction liste.
antoine
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Commits on May 14, 2020