save tracer log fix [0.3.2]

This version introduces multiple enhancements:

replaced wrong class by correct one to save log file

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

Modified:   /Lib/Core/Benchmark/Helper/Tracer.php
            -- Updated --
                saveToFile, changed class name to create log file

Modified:   /Lib/Core/Benchmark/etc/config.ini
            -- Modified --
                changed version from 0.3.1 to 0.3.2