Google Webfonts
WebFontConfig = {
google: { families: [ 'PT+Sans:400,400italic:latin', 'Ubuntu:300,400,500:latin' ] }
};
var cb = function() {
var wf = document.createElement('script');
wf.src = '//ajax.googleapis.com/ajax/libs/webfont/1/webfont.js';
wf.type = 'text/javascript';
wf.async = 'true';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(wf, s);
};
var raf = requestAnimationFrame || mozRequestAnimationFrame || webkitRequestAnimationFrame || msRequestAnimationFrame;
if(raf){
raf(cb);
}else{
window.addEventListener('load', cb);
}