2012-05-17 shotgun,sass,tilt http://ruby.about.com/od/sinatra/a/sinatra5.htm http://www.atmarkit.co.jp/fcoding/articles/sass/sassa.htmlhttp://route477.net/d/?date=20100218#p03 http://net.tutsplus.com/tutorials/ruby/ruby-for-newbies-the-tilt-gem/