Release of major versions of Abacre Point of Sale products

Released:

Abacre Restaurant Point of Sale v15.0
Abacre Retail Point of Sale v14.0
Abacre Hotel Management System v12.0
Abacre Cash Register v11.0
Abacre Inventory Management and Control v11.0

The list of changes:

* Feature: added possibility to use 6th tax.
* Feature: added support of tax label G required in Fiji.