Added test for Non-Stacked Bar Charts
Changed the "barline" chart to allow creation of yahoo/google finance charts.
 - Added test for normal bar chart in test/comingled-values with commingled negative positive values.
 - Ground work for test for Scatter Chart in test/scatter-chart.html.
 - Provision of string values/literals in datasets (Enhanced src/chartlets.js).
 - src/chartlets.min.js doesn't reflect the chartlets.js yet.