[webauthn] new commits pushed by vijaybh

The following commits were just pushed by vijaybh to 
https://github.com/w3c/webauthn:

* Add reference for U2F message formats
  by Vijay Bharadwaj
https://github.com/w3c/webauthn/commit/662a775443c87c060e528d71e81dae91068f7a7b

Received on Wednesday, 11 January 2017 18:12:36 UTC