Golden tax interface

Invoicing with an interface to the golden tax system is now enabled for China.

If the localization parameter for China is enabled in the Implemented Software Components (tccom0500m000) session, users can now select the Use External Invoicing System check box in the Invoicing Methods (tcmcs0555m000) session. If this check box is selected, a file is generated that can be submitted to the golden tax interface. Also, an incoming file from the golden tax interface can be read and the golden tax invoice number is updated in LN.