V5.99: Automatic updates, Library factorization, prices on VM2

Makefile

fields/vmupdatecredentialscheck.php

language/de-DE/de-DE.plg_vmshipment_rules_shipping.ini

...ge/de-DE/de-DE.plg_vmshipment_rules_shipping_advanced.ini

language/en-GB/en-GB.plg_vmshipment_rules_shipping.ini

library/index.html

releases/plg_opentools_vm_rules_shipping_advanced_v5.99.zip

releases/plg_opentools_vm_rules_shipping_v5.99.zip

rules_shipping.xml

rules_shipping_advanced.php

rules_shipping_advanced.xml

rules_shipping_framework_joomla.php