EDI fields related to orders

In order to support the excahnge of information, that in some cases are relevant for EDI, the following fields have been added (Order Type):

Open

Issuer Line Ref.

Open

E-Mail and telephone number

Contact information for delivery party

In addition, a clean-up of the code has been conducted, so that the old cross-reference has been removed, so that only new item reference is supported.