Move :root handling into interpretor.

Test basics of counter substitution.

Test counters() handling against longhand rather than shorthand.

Because that's where it'll be passed

Start testing counters implementations, fix syntactic shorthand lowering for counter[s]() functions.

Release XML Conduit Stylist 2.0.0.0!

Refactor style application API to use StyleTree abstraction.

Draft stylize function.

XML Conduit Stylist Refactor: convert XML Conduit tree to Haskell Stylist Element StyleTree.

Drop legacy html2css parsing functions.

Release new Haskell Stylist & XML Conduit Stylist!

XML Conduit Stylist changed to abstract away Haskell Stylist's breaking datastructure changes.

Correct pseudoclass to pseudoelement rewrites to apply to only rightmost selector.

I previously got the semantics of my datastructures backwards: the head is the rightmost selector.

ISSUES: Namespaces have just been implemented.

Remove preceding whitespace from all CSS at-rules.

Lower psuedoclasses & namespaces throughout CSS selectors.

Previously I just applied to them to the rightmost.

Rewrite parsed namespaces according to @namespace rules.

Evaluate attribute namespace selectors.

Parse namespace selectors.

Rewrite trivial cases of :where & :is.

This is mostly for the psuedoselector rewrites performed in Data.CSS.Preprocessor.PsuedoClasses

Compute correct specificity for :is() & :not() pseudoclasses.

Implement :nth-child() & :nth-of-type().

I don't think I'll implement :nth-last-child() & :nth-last-of-type() until I'm shown their value,
Haskell Stylist doesn't yet have access to the data to support them.