Add support for the PlayStation 4 browser.
Merge pull request #190 from typekit/bs-add-ps4-support

Add support for the PlayStation 4 browser.
Release 1.5.4
Correctly recognize the Chromecast browser.
Merge pull request #191 from typekit/bs-chromecast

Correctly recognize the Chromecast browser.
Release 1.5.5
Clarify loading font families in existing stylesheets using the custom module.
Add test for IE Mobile/Trident 7.0.
Merge branch 'master' of github.com:typekit/webfontloader
Merge pull request #1 from typekit/master

Update from original