Add post GitHub and culture of software development.
Add app_id meta property
Set data-href of facebook comment.
Add post Tizen 2.2 SDK release.
Update 2013-07-06-tizen-22-sdk-release.md
Update 2013-07-06-tizen-22-sdk-release.md
Add Gittip widget.
Add post Cocos2d-x 2.2 release.