邮件系统
	new file:   php/get_password.php
	new file:   php/register_send_email.php
	new file:   php/send_email.php
	new file:   register-confirm.html
	modified:   register.php
	modified:   get-password.php
	modified:   login.php
	modified:   php/login.php
	modified:   reset-password.php
	modified:   sent-confirm.html