Removed <var> and <b> elements
cdnJS, jQuery 2.0.2 and 1.10.1, no jQuery Migrate, console.log

jQuery EdgeCast's CDN replaced with cdnJS CDN since better performance
Updated jQuery 2.0.2 and 1.10.1
Removed jQuery Migrate, since full support of jQuery Address plugin
<main> element not supported on various browsers, does not paint CSS
.clearfix navigation float issue on IE
Avoid console.log on devices and not supported browsers
Optimized viewport, font and navigations, etc.

Optimized viewport font-size size to better UX
Default font-family: Cambria, Georgia, serif
Added navigation flexbox support Android 2.3
Navigation layout fallback issues for old browsers
Avoid IE10 gray background-color
No more need for optional Google CDN prefetch