Initial commit of sale_invoice_grouping module

review931002

__init__.py

@@ -0,0 +1,13 @@
+#This file is part of Tryton.  The COPYRIGHT file at the top level of this
+#repository contains the full copyright notices and license terms.
+
+from trytond.pool import Pool
+from .party import *
+from .sale import *
+
+
+def register():
+    Pool.register(
+        Sale,
+        Party,
+        module='sale_invoice_grouping', type_='model')