it translation - QUICK GUIDE TO IMPLEMENTING THE HTML5 AUDIO TAG
it translation - SCROLLING PERFORMANCE
it translation - USING THE PAGEVISIBILITY API
typos and stuff fixed
Merge branch 'master' of https://github.com/html5rocks/www.html5rocks.com
Merge branch 'master' of https://github.com/html5rocks/www.html5rocks.com
Merge pull request #274 from b3by/master

it translations - QUICK GUIDE TO IMPLEMENTING THE HTML5 AUDIO TAG // SCROLLING PERFORMANCE // USING THE PAGEVISIBILITY API