[w3c/webauthn] 546f82: Make makeCredential() more precise. (#347)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 546f82fccf9d676c49a0af109a7f11c563b09ae0
      https://github.com/w3c/webauthn/commit/546f82fccf9d676c49a0af109a7f11c563b09ae0
  Author: Jeffrey Yasskin <jyasskin@gmail.com>
  Date:   2017-03-01 (Wed, 01 Mar 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Make makeCredential() more precise. (#347)

* Make makeCredential() more precise.

I've linked a lot more terms, reordered explanations to be clearer, and
specified some missing behavior.

This fixes #273 and improves #270.

* Treat rpId as an origin.

* Go parallel later in makeCredential().

This fixes #263 and fixes half of #254.

* Fix #265.

* Fix #266.

* Fix annevk's and equalsJeffH's comments.

* Refer to #362.

* Improve processing of unsupported extensions.