http://www.railsinside.com/screencasts/373-rails-3-upgrade-screencast.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+RailsInside+%28Rails+Inside%29&utm_content=Google+Reader
ʂ̃TCgɃWv悤ƂĂ܂BXΏL̃NNbNĂ
UPLIFTōLȂő̌܂傤IKȉ{Ct܂I