[w3c/webauthn] 15e1b9: Lots of FPWD issues (#83)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 15e1b9156a22be70ae2fef1f4df80f7679fffad9
      https://github.com/w3c/webauthn/commit/15e1b9156a22be70ae2fef1f4df80f7679fffad9
  Author: Vijay Bharadwaj <vijaybh@users.noreply.github.com>
  Date:   2016-05-12 (Thu, 12 May 2016)

  Changed paths:
    M index.src.html

  Log Message:
  -----------
  Lots of FPWD issues (#83)

* Clarify that RP ID is globally unique

Fixes #38, #16.

* Clarify that extensions are optional

Fixes #74

* Clarify credential type

Fixes #15

* Make method parameters consistent between API and authenticator model sections

Fixes #30

* Clarify attestation model vs. attestation type

Fixes #27, #28

* Use case: user can use WebAuthn credential when creating account, avoiding passwords entirely

Fixes #10

* Clarify security model and remove vestiges of "native API" language

Fixes #58 by adding verbiage in the API section about the two layers in
the WebAuthn security model. This discussion is ongoing with the TAG, so
we will open a new issue if there are follow-ups.

Fixes #20, #21, #23 by removing mentions of native apps and APIs, as
these are out of scope for this specification.

* JsonWebKey is a dictionary not an interface

Fixed sloppy terminology usage

* Remove unnecessary ref

WebCrypto is not a reference for byte arrays