[releases] v0.17.0

[stp-ip]

• [x] Update changelog
• [x] Change Hugo min version in theme.toml
• [x] Change version
  • [x] /VERSION
  • [x] .seed-config.yaml
  • [x] /package.json
  • [x] /exampleSite/package.json
  • [x] /exampleSite/config.toml
  • [x] /exampleSite/config-dev.toml
  • [x] /exampleSite/content/docs/installation/content.md
  • [x] layouts/partials/head.html

• [x] Create stable release branch vX.X (gets minor, non breaking updates)

• [x] Migrate various test/production sites to release branch

• [x] tag alpha, beta releases, if necessary

• [x] Fix/document remaining bugs/PRs
• [x] Test sites again

• [x] Rinse and repeat

• [x] Update docs to latest release branch
• [x] Create final tag
• [x] Create Github release
• [x] Release notes
• [x] Migrate starter repo
  • [x] Update submodule
  • [x] Update config.toml (with version and content changes)

  • [x] Change Hugo version in netlify.toml

• [x] Test latest release with themes.gohugo.io script
• [x] Merge latest syna demo/page into about.okkur.org/syna/ (see syna/README for specifics)