class added for bars and bargroups
class added for bars and bargroups

hashd/uvCharts,RobertoMalatesta/uvCharts,chrfin/uvCharts,RobertoMalatesta/uvCharts,shrimalmadhur/uvCharts,gadgauss/uvCharts,shrimalmadhur/uvCharts,hashd/uvCharts,chrfin/uvCharts,gadgauss/uvCharts