Squashed commit of the following:

commit 109353518e26bdc7d0cc2f7d2dcd169470608bb1
Author: Yunfei Zu <zuyunfei@gmail.com>
Date:   Fri Jun 14 16:21:45 2013 +0800

    new post 2013-06-09-introduction-of-tmux
use the tmux-sample.png locally
add CNAME
change comment system and share button
add favicon, blog_backround, duoshuo comment, baidu analytics, weibo show, same font color
new post 2013-06-11-cpp-idioms-pimpl
Merge branch 'master' into draft

Conflicts:
	source/_posts/2013-06-09-introduction-of-tmux.md