Epic: Tidy up documentation

[redtux]

@redtux commented on Wed Dec 23 2020

Before going live all documentation needs to be…

1. clear (intelligible and proofread content)
2. clean (linting and simplifying source code)
3. complete (describing all features, requirements and libraries).

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@github-actions[bot] commented on Mon Feb 22 2021

This issue has been hanging around a bit too long. If needed, please update or comment.