create legend skeleton
implement group naming in base and stackable charts
implement legend labels
update css for legend
add color to legend
refactor legend positioning code
fix chartBody css class name
implement legend handler on line chart
add legend test cases for line chart
improve legend item test case
add guard to project
add legend label test case
add legend label test case
add legend mouse over for bar chart
add legend to composite chart
modify legend item vertical placement
fix legend mouse over for composite chart
remove dot highlighting and fadeout