[w3c/webauthn] 758115: Updated editors and acknowledgements (#726)

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 758115fa641e92234485369b1129741b6fde533d
      https://github.com/w3c/webauthn/commit/758115fa641e92234485369b1129741b6fde533d
  Author: Mike Jones <Michael.Jones@microsoft.com>
  Date:   2017-12-20 (Wed, 20 Dec 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Updated editors and acknowledgements (#726)

Updated editors and acknowledgements and added contributors section