Ruby God プロセス監視・再起動

http://qiita.com/sawanoboly/items/0c9202d447ec67402a0f
http://aligach.net/diary/20090817.html
http://takuya-1st.hatenablog.jp/entry/20110918/1316365681
http://qiita.com/sawanoboly/items/0c9202d447ec67402a0f