[w3c/webauthn] d89c50: Sign counter alg clarification [see issue #507] (#...

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: d89c5031770f673288c1f5cb320adf33cbf11463
      https://github.com/w3c/webauthn/commit/d89c5031770f673288c1f5cb320adf33cbf11463
  Author: Rolf Lindemann <rolf.lindemann@gmx.net>
  Date:   2017-10-11 (Wed, 11 Oct 2017)

  Changed paths:
    M index.bs

  Log Message:
  -----------
  Sign counter alg clarification [see issue #507] (#539)

* added description for U2F attestation format

* more description added

* ...

* added RP processing rule for signature counter

* explanation added: why should you compare signature counter

* add explanation: where does signature come from

* changes as requested in the PR

* changes as requested in the PR

* changes as requested in the PR

* correction

* more corrections

* typo

* corrected phrase as indicated by equalsJeffH

* correction: bikeshed still wants spaces - not tabs

* updating signcounter consideration according to suggestion in comment

* synatax corrections

* synatax corrections

* more changes added

* more corrections according to the comments in the issue

* addressed second last comment

* removed signing procedure details and referred to CTAP2 section 7

* fixed indent issue

* fix typo