[Fork] Feedly backend

http://laiso.hatenablog.com/entry/2014/10/12/Fastladder%E3%81%AE%E3%83%90%E3%83%83%E3%82%AF%E3%82%A8%E3%83%B3%E3%83%89%E3%82%92Feedly%E3%81%AB%E3%81%99%E3%82%8B%E3%83%95%E3%82%A9%E3%83%BC%E3%82%AF%E3%82%92%E4%BD%9C%E3%81%A3%E3%81%9F