changed some system directories [0.20.0]

This version introduces multiple enhancements:

changed location of cache, log and tmp directories
moved from Lib to var

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

Added:      /var/.htaccess
            -- Added --
                added secure for access

Modified:   /Lib/loader.php
            -- Updated --
                _setPaths, changed paths

Modified:   /Lib/config.ini
            -- Modified --
                changed version from 0.19.0 to 0.20.0