update post
preview with --drafts
change ext markdown to md
add toc; cache post images for 7d
add friends link
seo note
sitemap generator
fix background bug
add post
server task
fix deploy
improve nginx.conf
modify deploy solution
fix gzip compression mistake
don't purge pages.txt
fix
rewrite Rakefile
add ruby notes
update sitemap building rake task
modify description meta generation rule