Reorganize the chart tests, ordered per dataset
Reorganize the chart tests, ordered per dataset

leebecker-hapara/d3.chart.heatmap-matrix,benbria/d3.chart.bubble-matrix,benbria/d3.chart.bubble-matrix,leebecker-hapara/d3.chart.heatmap-matrix,leebecker-hapara/d3.chart.heatmap-matrix