Joyride breaks if Modernizr isn't included on the page

JS Error: "Uncaught ReferenceError: Modernizr is not defined" within Joyride's #is_phone method when Modernizr isn't included on the page.

Basically applying [standalone Joyride's](https://github.com/zurb/joyride/blob/master/jquery.joyride-2.1.js#L54) Modernizr falsey assignment check and using the correct window inside #is_phone's fallback when Modernizr is falsey.