Replaced fuzzy screenshot image.
Small wording tweak to article title and description.
Added my profile photo.
Automatically updating the calendar
remove an unclosed strong tag & modify links to go to the translated page in korean.
Merge pull request #1039 from nurinamu/webrtc_basic

fix tag errors & modify URLs.
Merge pull request #1040 from pearlchen/devtools-async-call-stacks

Devtools async call stacks
Merge pull request #1041 from html5rocks/master

Merging to live.