Release new Haskell Stylist & XML Conduit Stylist!

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

Substitute in counters for any CSS textual property, not just `content`.

Will be required by Rhapsode for navigational markers.

Implement whitespace collapse, togglable via white-space: pre/normal;

Parse & prepare to handle white-space: pre;

Implement CSS3 counters.

Parse CSS counters.