It can be helpful to have some diagnostic pages for development and quality control. I added one here for the logos, which renders all the named logos in ?style=flat and ?style=social.
- Stop running daily service tests in the main repo (since they're now handled [over here](https://github.com/badges/daily-tests)
- 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