Squashed commit of the following:

commit f684641afb6ef8be331a01c39f5bd564469c8846
Author: Takayuki Sei <takayuki_sei@voyagegroup.com>
Date:   Sat May 25 14:03:20 2013 +0900

    added auth.php

commit 57ef8fa4229d6d1ae0bb4e74244f900c098e44e9
Author: Takayuki Sei <takayuki_sei@voyagegroup.com>
Date:   Sat May 25 14:02:59 2013 +0900

    added tw.php