send notification to user after order created.
add shipping address info method.
add event order mail test.
add order mailer: notify_organizer_created.
notify organizer that order has created.
use background job to send email.
add order mailer: notify_user_paid.
send notification to user after order paid.
remove duplicated pay method.
dd order mailer: notify_organizer_paid.
send notification to organizer after order paid.
email content should not has pay_link if order is free.
add price unit.
Merge branch 'master' into saberma-feature/464-send-notification-to-user-and-organizer-when-order-create-and-pay
fixed rspec error.
add utf-8.
fixed: order items should show in multiline.
add order item unit_price.
Merge pull request #524 from saberma/saberma-feature/464-send-notification-to-user-and-organizer-when-order-create-and-pay

订单下单和支付后向用户和管理员发送邮件通知 #464