[w3c/webauthn] 81e805: fix #24: add reg & authn flow diagrams (#1007)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 81e8056e275eed52606b7eb406ee426695d75631
      https://github.com/w3c/webauthn/commit/81e8056e275eed52606b7eb406ee426695d75631
  Author: =JeffH <mobileuser@kingsmountain.com>
  Date:   2018-07-25 (Wed, 25 Jul 2018)

  Changed paths:
    A images/webauthn-authentication-flow-01.svg
    A images/webauthn-registration-flow-01.svg
    M index.bs

  Log Message:
  -----------
  fix #24: add reg & authn flow diagrams (#1007)

* fix #24: add reg & authn flow diagrams, thanks apowers313!

* renumber figure references



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