Introduced invoices and deliveries. Integration (especially of deliveries) isn't finished yet.

test/fixtures/group_order_article_quantities.yml

@@ -1,3 +1,15 @@
+# == Schema Information
+# Schema version: 20090102171850
+#
+# Table name: group_order_article_quantities
+#
+#  id                     :integer(4)      not null, primary key
+#  group_order_article_id :integer(4)      default(0), not null
+#  quantity               :integer(4)      default(0)
+#  tolerance              :integer(4)      default(0)
+#  created_on             :datetime        not null
+#
+
 # Read about fixtures at http://ar.rubyonrails.org/classes/Fixtures.html
 first:
   id: 1