new module and loader modifications [0.13.0]

This version introduces multiple enhancements:

added core module Disc to manage files and directories
also modified loader to use only specified methods at start

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

Added:      /Lib/Core/Disc/etc/config.ini

Added:      /Lib/Core/Disc/Helper/Common.php
            -- Added --
                common methds

Added:      /Lib/Core/Disc/Model/Directory.php
            -- Added --
                use dctory as object

Added:      /Lib/Core/Disc/Model/File.php
            -- Added --
                use file as object

Modified:   /Lib/config.ini
            -- Added --
                enabled core_disc module
            -- Updated --
                changed version from 0.12.1 to 0.13.0

Modified:   /Lib/loader.php
            -- Added --
                $_skipConstructorMethods to store default loader configuration
            -- Updated --
                loadClass, changed checking that library is enabled
                _setRegister, check is enabled, return $this
                _loadConfiguration, check is enabled, return $this
                _initModules, check is enabled, return $this
                _checkTemp, check is enabled, return $this
                _setPaths, check is enabled, return $this
                __construct, set up configuration