Release of minor versions of classical Abacre Point of Sale products

Released:

Abacre Restaurant Point of Sale v11.9
Abacre Retail Point of Sale v10.9
Abacre Hotel Management System v8.9
Abacre Cash Register v7.9
Abacre Inventory Management and Control v7.9

The list of changes:

* Feature: added new report: Sales by Year-Month.
* Feature: added new Security role: Show Email Sender button.
* Feature: added new bill configuration parameter: {$clientterm}