Initial implementation for new group selection.
Display of group and country data in same chart.
Added custom legend
Made legend interactive.
Added levels compare charts.
Changed axis on levels compare.
Added multi-statistic multi-year heatmap.
Sorting by year in Heatmap.
Allow for changing heatmap statistic.
Tootips on heatmap
Added hightlighting year when sorting on heatmap.
fixed highlighting by sort year on Heatmap.
Heatmap: sorting null values by alphabetical country order.
Heatmap: added initial selection highlight
Compare Levels: data changes when current statistic does.
Added instructions.
Overall layout changes.
Overall cosmetic changes.
Further changes to instruction text.