[w3c/webauthn] 14db08: GitHub pages bugfix: Pull in `bikeshed-template` P...

  Branch: refs/heads/master
  Home:   https://github.com/w3c/webauthn
  Commit: 14db0869b5baa2c07e09b71e234c968ceddc3383
      https://github.com/w3c/webauthn/commit/14db0869b5baa2c07e09b71e234c968ceddc3383
  Author: James 'J.C.' Jones <james.jc.jones@gmail.com>
  Date:   2016-04-13 (Wed, 13 Apr 2016)

  Changed paths:
    M lib/id.mk

  Log Message:
  -----------
  GitHub pages bugfix: Pull in `bikeshed-template` PR detection fix (#72)

PRs were being incorrectly detected after a TravisCI environment variable
change that happened some time ago. This updates the logic to be more robust.