Html document type and "queried for" assertion

[papandreou]

The identify function of HTMLDocument should probably be improved, but I had a little trouble understanding the overall strategy for detecting these instances in both the browser and jsdom.

queried for is the spike I mentioned on the unexpected gitter. It's one out of many possible takes on how to add querying support.

[Munter]

I'm a bit unsure of the queried for assertion as it's quite like what I'd want to have in to have childrenwith a query selector. But we're far from stable, so merging and then we can take a closer look at the API when there are enough primitives at hand

[Munter]

Published in v0.2.0

[papandreou]

That's fair enough, thanks!

Btw. I forgot to provide an equals function for the HTMLDocument type, which means it will use DOMNode's, and that won't be correct. I think we'll need some serialization code that'll take an entire document before that can be fixed.