Incoming data module

This version introduces multiple enhancements:

finished modulr to handle incoming data (GET, POST, COOKIE, SESSION, FILES)
also added list of events, clear cache file, aded tmp directory

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

Added:      /shell/clear_cache.php
            -- Added --
                will handle cleare cache directory

Added:      /doc/events.md
            -- Added --
                list of all available events

Added:      /Lib/Core/Incoming/Model/Abstract.php
            -- Added --
                base class for handling GET, POST and FILES

Added:      /Lib/Core/Incoming/Initialize.php
            -- Added --
                initialize incoming data classes

Added:      /Lib/Core/Incoming/etc/config.ini
            -- Added --
                configuration

Added:      /Lib/Core/Incoming/Model/Get.php
            -- Added --
                handle GET data

Added:      /Lib/Core/Incoming/Model/Post.php
            -- Added --
                handle POST data

Added:      /Lib/Core/Incoming/Model/Cookie.php
            -- Added --
                handle COOKIE data

Added:      /Lib/Core/Incoming/Model/Session.php
            -- Added --
                handle SESSION data

Added:      /Lib/Core/Incoming/Model/File.php
            -- Added --
                handle FILES data

Modified:   /Lib/loader.php
            -- Added --
                _checkTemp to check that tmp directory exists
            -- Updated --
                __construct, added handling of _checkTemp method
                _setPaths to create constans with path to tmp directory

Modified:   /Lib/config.ini
            -- Added --
                incoming module enabled
            -- Updated --
                changed version from 0.6.1 to 0.7.0