to use from to dita conversion from xsl/ant to generate png graphs
#32 ${graph_to_image.check.force_install_flag} $p5build.isMac==${p5build.isMac}
#35 OK ${graph_to_image.check.ok}
#42 WARNING ${graph_to_image.check.error}
gnuplot ${barchart.gnuplot.dita}