Add couchbase with modifications, formalize broadcaster and make testable and some other stuff

app/models/list.rb

@@ -270,6 +270,7 @@ class List
     return false unless user
     order = Order.create list: self, supplier: supplier, user: user, section_id: section_id
     return unless order.id
+    orders_in_process_count = supplier.increment_orders_in_process_count!
     loaded_products = self.class.database.load_document products.keys
     products.each do |product_id, quantity|
       quantity = quantity.to_i
@@ -280,9 +281,11 @@ class List
     save
     for user_id in user_ids
       broadcast_user user_id, 'new_order', order: order.with_products_as_json, total_amount: price
+      broadcast_user user_id, 'orders_in_process_count', count: orders_in_process_count
     end
     broadcast_supplier supplier.id, 'list_update', active_model_serializer.new(self).as_json
     broadcast_supplier supplier.id, 'new_order', OrderSerializer.new(order)
+    broadcast_supplier supplier.id, 'orders_in_process_count', count: orders_in_process_count
     order
   end