[webkit-dev] New script to import W3C CSS tests

[Tony Gentilcore]

> I also got a little inspiration from the
> import-w3c-performance-wg-tests that already exists. I followed a few of
> their steps, but had to add a few layers to handle the added complexity of
> the CSS test suites.

Is there any way we can merge the two scripts so there is only one
import/exporter than handles both performance and CSS test suites?

-Tony