Consider, possibly, adding linter support or plugins

[vmadman]

I am not sure on this, yet, but It could be useful for Grits.js to imbue various linters, such as stylelint, eslint, etc, and run them during render operations.

Possible Uses:

• This could be used to stop render ops in CI environments if bad code is submitted.
• Grits could give warnings during live/watch mode about linting failures
• Grits could even use linters to learn about or improve upon it's own rendering output.