tornevalls-resurs-bank-payment-gateway-for-woocommerce

WOO-852, continued.

* added requirements to create process (orderReference must be present).
* updated callback url generation-request.
* Created callback class for handling callbacks and inital order statuses.
* Removed more ecom1-generic requirements disocvered through some plugin activation errors.
* Removed "self awareness stuff".
* Updated Util class.