* Add a script for the linting that cannot be accomplished by our other linters
Currently this only contains linting for whether our icons are alphabetically sorted
* Add our own linting to Travis
* Fix Let's Encrypt being incorrectly sorted
* Intentionally break sorting to test CI
* Revert "Intentionally break sorting to test CI"
This reverts commit 55e4070b3c.
* Explain in CONTRIBUTION.md how to sort metadata
