Translation base
Porting existing localisation guide #780

Taken from the wiki.
Changes for localisation guide #780
Update LOCALIZATION.md
Translated draft
Removed unnecessary comments & added missing texts. converted to html file.
devtools for mobile article.
addressing image paths.
fix image paths.
Merge pull request #781 from cwdoh/article.ko.mobile.testing

Translated 'Synchronized Cross-device Mobile Testing By Addy Osmani' into Korean.
Merge pull request #782 from html5rocks/master

Merging translations to live and article