change font URI to be scheme-relative (avoid mixed content issue)
Handle HTTP 400 errors thrown when a dependant bug is non-public (issue 55)
Merge pull request #53 from mozfreddyb/mixed-content-font

change font URI to be scheme-relative (avoid mixed content issue), fixes #52
Merge pull request #56 from edmorley/handle-http400

Handle HTTP 400 errors thrown when a dependant bug is non-public (issue 55)