[w3c/webauthn] d468a7: fix #254: credman alignment: update #getAssertion ...

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: d468a75b6a723867d24add0bd01bd7225acbcdbf
      https://github.com/w3c/webauthn/commit/d468a75b6a723867d24add0bd01bd7225acbcdbf
  Author: =JeffH <Jeff.Hodges@KingsMountain.com>
  Date:   2017-11-09 (Thu, 09 Nov 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  fix #254: credman alignment: update #getAssertion section a la PR #498 (#665)

* actually improve #254, and fix #661

* DiscoFrmExtSource(options) -> (origin, options)

* make [[DiscoFrmExtSource]]'s exposition match [[Create]]'s

* deal with yet another fix #254 straggler in [[Create]]

* get rid of |global| in [[DiscoFrmExtSource]]

* remove 'in parallel' and 'global' stuff from #discover-from-external-source alg

* work on #discover-from-external-source alg to improve #254

* finish (one hopes) work on #discover-from-external-source alg to fix #254

* minor editorial

* repair #createCredential intro parag, improves issue #671

* complete fix #671