Skip Payment for Orders Where Total Value Is 0$

[nichtmonti]

relates to #715 After selecting tickets the session variable 'order_requires_payment' is added. This variable can be used to selectively skip the payment process.

The modifications to the EventCheckoutController as well as the EventCreateOrderSection view allow for going from entering details straight to the confirmed order. This is certainly not production ready but can hopefully serve as a starting point.