Redesign blog.

	modified:   _config.yml
	new file:   _includes/disqus.html
	modified:   _includes/footer.html
	modified:   _includes/head.html
	modified:   _includes/header.html
	modified:   _includes/navigation.html
	modified:   _layouts/default.html
	modified:   _layouts/page.html
	modified:   _layouts/post.html
	new file:   _posts/2012-08-12-summer.md
	modified:   _posts/2012-08-24-critical-thinking.md
	modified:   _posts/2013-07-23-qingdao.md
	modified:   _posts/2013-08-13-deng-xiao-ping-and-the-transformation-of-china.md
	modified:   _posts/2013-11-03-get-started-with-arch-linux.md
	modified:   _posts/2013-11-29-zen-and-the-art-of-motorcycle-maintenance.md
	modified:   _posts/2013-12-31-rework.md
	modified:   _posts/2014-06-17-zhuang-b.md
	modified:   about.md
	new file:   css/custom.css
	new file:   css/mei.css
	new file:   css/normalize.css
	deleted:    css/pixyll.css
	deleted:    css/solarized-dark.css
	deleted:    css/solarized-light.css
	new file:   images/hope.jpg
	modified:   images/rippleyui.jpg
	modified:   index.html
	deleted:    posts.html
	new file:   projects.md