Add CSS linter

[kristoferjoseph]

Need to lint output CSS for common errors and source order.
See

• Recess
• CSSComb
• CSSLint

[techwraith]

It would be really cool if Rework had a css linting plugin available to it. That way it could warn you as it pulls each file in and tell you which file has the lint warning/error.

I haven't seen one yet, and I think finding something that handles the import case would be tough. Building this may be tougher though.

Thoughts?

[kristoferjoseph]

@techwraith I have already needed this while refactoring. There are not line meaningful numbers when working with the ast. Wondering how much overlap with the source map plugin there would need to be for this.