Account Invoice Import UBL

This module is an extension of the module account_invoice_import to add the ability to import UBL XML invoices. The UBL (Universal Business Language) standard is a XML standard for business documents (invoices, purchase orders, etc...) created by OASIS (Organization for the Advancement of Structured Information Standards). The UBL standard became the ISO/IEC 19845 standard in December 2015 (cf the official announce <http://www.prweb.com/releases/2016/01/prweb13186919.htm>_).

This module works well with e-fff invoices as used in Belgium (e-fff invoices are UBL invoices with an embedded PDF file).