update for disc module [0.4.0]

This version introduces multiple enhancements:

added some methods with logic for file and directory object

Details of additions/deletions below:
--------------------------------------------------------------

Added:      /Lib/Core/Disc/Model/Interface.php
            -- Added --
                file and directory object interface

Modified:   /Lib/Core/Disc/Model/Directory.php
            -- Added --
                $_directoryData
                addChildFile
                addChildDirectory
                load
                delete
                move
                rename
                copy
                _readContent
                setPermissions
            -- Updated --
                __construct, added base logic

Modified:   /Lib/Core/Disc/Model/File.php
            -- Added --
                $_fileData
                delete with logic
                save with logic
                load with logic
                _getFullPath to return full file name with path
                _getFullName to return full file name
                move with part of logic
                copy with part of logic
                putContent
                replaceContent
                rename
                setPermissions
                _setFileTimes
                __destruct with logic
            -- Updated --
                __construct, added complete logic

Modified:   /Lib/Core/Disc/etc/config.ini
            -- Modified --
                changed version from 0.3.0 to 0.4.0