publiclab/mapknitter

Fixes #0000 (<=== Add issue number here)

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* [ ] PR is descriptively titled 📑 and links the original issue above 🔗
* [ ] tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR -- or run tests locally with `rake test`
* [ ] code is in uniquely-named feature branch and has no merge conflicts 📁
* [ ] screenshots/GIFs are attached 📎 in case of UI updation
* [ ] ask `@publiclab/mapknitter-reviewers` for help, in a comment below

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Thanks!