Use HTML prettifier

[ForbesLindesay]

If we use a separate HTML prettifier we can move out all the issues surrounding formatting of pretty printing HTML into a library that actually cares. Jade should focus on compiling jade to html, not pretty printing that html.

[eddiemonge]

oi. #1124 sigh sad face

[ForbesLindesay]

hmm, yes, I don't mind accepting that in the mean time (if you make the tests pass). I've been thinking this for a while. I didn't realise I hadn't created an issue for it.

[rlidwka]

@ForbesLindesay , no progress on this yet?

I'm almost ready to write one myself, since whitespace issues just bit me yesterday :P

[ForbesLindesay]

no progress yet. https://github.com/einars/js-beautify/blob/master/js/lib/beautify-html.js seems like it should make for a good starting point.

[jerrylau91]

HTTPie is awesome

[ForbesLindesay]

@jerry-lau not sure what you're referring to, do you have a link?