Change pretty print size to display IEC units and use toFixed() instead of round.
Duration series representing the second yaxis in graph have been removed and are now draw in a new "Average queries duration" graph. pretty_print_number() have also been modified to handle seconds and microseconds.
Split temporary files report into two graphs (files size and number of file) to no more used a second Y axis with flotr2 - mouse tracker was not working as expected.