Update History.md
Tpyo.
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Add baseline to bar chart (default to black)
add hover event to outline bar and write value
using global var mousePos

I know, I need to remove it.
brought updates from full version
removed global var
removed global var
better baseline, outline, and tooltip behavior

Better defaults and support for different sizes
changes from non-minified version
minor (focus properties now start with focus instead of stroke)
match the non-minified
outline on pies, started focus lines on pies
nearly working pie focus outline
working pie focus outline
fix
new mouseout to clear focus

chart type-independent event listeners in plugin prototype
multi-line with baseline chart, optional fill in line chart
minify