Mozilla parser API link is dead

[make-github-pseudonymous-again]

The link https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API is dead. It is used in the first paragraph of the README.

[AndyOGo]

Different version can be found in an archive, e.g.
http://web.archive.org/web/20140802223108/https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API

And this presentation by Michael Ficarra
https://speakerdeck.com/michaelficarra/spidermonkey-parser-api-a-standard-for-structured-js-representations

As well as this gist
https://gist.github.com/tiye/5940525