smidig/conference-app — pull request #16 by ivarconr (2013-04-02 19:17:16+00:00)
Title: Added order and payment concept

An order can have one or more user.
An order must have an order.
It is possible to add one or more users to an order.
An order must be paid with an payment.
Payment exists in two types: PaypalPayment and ManualPayment.
ManualPayment requires invoice address (pref. email), company name and contact person.