[tracking] updates for norns 2.0

[pq]

tracking issue for doc updates corresponding w/ norns 2.0

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bits to review:

• [ ] studies
  • [ ] study 1
  • [ ] study 2
  • [ ] study 3
  • [ ] study 4
  • [ ] study 5
• [ ] update instructions
• [ ] legend
• [ ] faq
• [ ] roadmap

[tehn]

also:

• [ ] script gathering/sharing (how to manage dust, lines wiki thread for directory of scripts)
• [ ] script repos and docs (ie, move mlr to its own repo, update docs)