i18n, viewport, dns-prefetch and UA improvements

Google I/O 2013 latest viewport optimization suggestion with disabled
zoom "maximum-scale=1" http://io13-high-dpi.appspot.com,
https://developers.google.com/chrome/mobile/docs/webview/pixelperfect#viewport
i18n issue HTML lang=en
Do not perform dns-prefetch for serving one, two files
Universal Analytics the same ID compatible for multiple domains
Better compatibility, fixed flicker, overflow and viewport issue

Improved text usability with word-spacing
Better handled overflow body than in html
iOS 7 overflow issue http://barrow.io/overflow-scrolling
Disable double-tap-zoom
http://msdn.microsoft.com/en-us/library/windows/apps/Hh767313.aspx
Better compatibility for nav design
Updated @viewport
Removed flicker by removing -webkit-backface-visibility: hidden;
-webkit-perspective: 1000;
Better Webkit compatibility
Added HTML table vs CSS block/table/flex benchmark
Shorter javascript:void(0)

Shorter javascript:void(0)
http://stackoverflow.com/questions/9596913/javascriptvoid0-too-long-shorter-way
Use filename-based versioning to avoid CDN cache issue
Improved form element compatibility, legacy issues

overflow moved back from body to html because of IE7 legacy
Improved form element compatibility, applied IE11 legacy fixes
Remove FirefoxOS custom design from input and textarea
Redesign Installer UI with Google Universal Analytics setup
New style.css version
Fixed syntax error "unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM), expecting '('"