added paypal notify controller
inital paypal integration
added order model
added specs at price implementation for order
added specs at price implementation for order
added tests
Added ticket as factory
Removed unused PaymentHelper
Added payment-model with to types: PaypalPayment and ManualPayment (invoice)
Added invoice id to payment
Created order-flow integrated with paypal
more paypal stuff
removed invoice_is from user
fixed volatile tests
Db migrate..
Added handeling for special/hidden free tickets
Admins should be able to view orders
should not be possible to modify a completed order
Admins should be able to update whether a user is completed or not
minor adjustment in listing