• [Feature] Added shadow property in LineChartData to have shadow effect in our LineChart, take a look at LineChartSampl5, #304.
• [Feature] Added isStepLineChart, and lineChartStepData in the LineChartData to support Step Line Chart, take a look at lineChartSample3, #303.
• [Improvement] Added barData parameter to checkToShowDot Function in the FlDotData.