BEP 18 suggestions

[effigies]

When this is ready to merge, please squash or rebase, so we don't bother polluting the changelog.

Suggestions:

1. Replace bullets with sentences.
2. Language updates for consistency with common-derivatives.
3. Typo fixes (e.g., Connectom -> Connectome)
4. Make examples more specific and conformant to required types

[effigies]

@claramoreau9 I'm unable to request a review from you, but assuming you're the extension developer, I would appreciate your eyes.

[CPernet]

all good for me except genetic_info.json - why removing the multiple entries, I do want to show that multiple info can be entered ; and indeed it is often the case that different analytics are provided

[effigies]

Cyril, I'm not sure what you mean about removing multiple entries. I don't think I changed anything in that respect. Could you show how you would like it to read?

[CPernet]

it's me who read to quickly, you only changed to have to the next line ... sorry
anyway in the UK bb example (not finished, I know sorry) we wote:

"AnalyticalApproach": ["Whole Genome Sequencing","SNP/CNV Genotypes"],

I think it's better, showing multiple options -- is that correct to use the square brackets and list items?
Maybe we should do that here too.
thx

FYI: https://github.com/CPernet/bids-examples/tree/master/genetics_ukbb

[CPernet]

are we good on that one now? anything i need to do