Added requirement for `pg_service.conf` (closes #3646)
Removed references to "apache system user" (refs #3646)
(exploitation.md) Removed references to dynacase-platform (refs #3646)
(installation.md) Added parameters from dynacase-core (refs #3646)
(introduction.md) Removed references to module Dynacase Platform (refs #3646)
(pre-req.md) Added required Apache's `AllowOverride All` (refs #3646)
Updated screenshots with dynacase-control-1.4 and dynacase-core-3.2 (refs #3646)