Web Crypto API, Chrome 37

Hi,

Where can I find docs for the Web Crypto API?

Alternatively, if no docs are available, is their a polyfill that mimics
the native API?

Pretty big deal, but apparently not even Stackoverflow has any hint of it.

I googled plenty but nothing came up as far as docs other than the W3C
spec. https://dvcs.w3.org/hg/webcrypto-api/raw-file/tip/spec/Overview.html

It's enabled by default on Chrome 37.

Where are the docs?