Coverage cleanup

[paulmelnikow]

• Stop running daily service tests in the main repo (since they're now handled over here
• Add coverage and separate daily tests badges with links to coveralls
• Update our coverage ignores
  • Move scripts, which do not need coverage, into scripts/
• Split out coverage test for npm package
• Remove spurious env var

Ref: #1584 #2314

[shields-ci]

	Warnings
⚠️	This PR modified `package.json`, but not `package-lock.json` - Perhaps you need to run `npm install`?

	Messages
📖	✨ Thanks for your contribution to Shields, @paulmelnikow!
📖	Thanks for contributing to our documentation. We ❤️ our [documentarians](http://www.writethedocs.org/)!

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[shields-deployment]

This pull request was merged to master branch. This change is now waiting for deployment, which will usually happen within a few days. Stay tuned by joining our #ops channel on Discord!

After deployment, changes are copied to gh-pages branch: