[w3c/webauthn] 5e63e5: Resolve linking errors for WD-07 publication (#703...

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 5e63e5780a531a1cf8cf0e9f9e9b55507982bc9f
      https://github.com/w3c/webauthn/commit/5e63e5780a531a1cf8cf0e9f9e9b55507982bc9f
  Author: Angelo Liao <huliao@microsoft.com>
  Date:   2017-12-04 (Mon, 04 Dec 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Resolve linking errors for WD-07 publication (#703)

* fix proper subset tweak

* resolve linking error for AttestationNotPrivateError

* resolve linking error: idl ref not found for [[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)

* remove unnecessary commits

* accept jeff suggestion