http://qiita.com/ryo_grid/items/e746238c78b8c6427200

https://www.facebook.com/shen.l.liang/posts/10204059909244929

https://www.facebook.com/shen.l.liang/posts/10204047907384890

https://www.facebook.com/shen.l.liang/posts/10204034351886011

https://www.facebook.com/shen.l.liang/posts/10204015676779145

https://www.facebook.com/shen.l.liang/posts/10204012581421763

https://www.facebook.com/shen.l.liang/posts/10203989775411627

どんな手法を使うのがいいのかな https://www.facebook.com/shen.l.liang/posts/10203981103434833