updated diffs of state of vgb-u2f-attestation branch (see PR #321)

https://github.com/w3c/webauthn/pull/321


New diffs:
just the diff of the "editorial revisions" commits added since the last set of diffs (above): i.e., most recent commit 7642dd6<https://github.com/w3c/webauthn/commit/7642dd6d15e80e89cd0a38ca35b889b42845f840> diff'd from dc90eab<https://github.com/w3c/webauthn/commit/dc90eabae25ff4c439b9d0c50ddbe759e187bdef>:
http://kingsmountain.com/doc/diff/diff-webauthn-vgb-u2f-attestation-7642dd6--from--index-vgb-u2f-attestation-dc90eab.pdf


diff of most recent commit from current state of master branch:
http://kingsmountain.com/doc/diff/diff-webauthn-vgb-u2f-attestation-7642dd6--from--index-master-4751dac.pdf