removed reference to property
targetpay update to use new payment class methods
Merge origin/develop into develop
update to support a get method for status.
removed unused constructor
use new get_status method from WP_Pay_Payment class
removed old update meta code
fixed incorrect callback method name
authentication url support
support for id as part of the parent Payment class
now sets authentication url, increased spacing
removed the ID reference from Pronamic_WP_Pay
addition of using methods from Payment class
removed the reference to qantani code for now. Not used anywhere yet.
set transaction id, and fixed reference to incorrect property name in get_id
change to use the id method, as id is now protected
updates to no longer use the direct property reference to $payment->id.

Did a full ceck for Pronamic_Pay_Payment, and ensured each usage of the class referenced the new method.
Merge origin/develop into develop