Add an option for displaying {percentage, value, or value(percentage)} for the label on the pie slices.
Add an option for displaying title for chart legend.
Add a check for height < 0 and and force height to be 0 so bar chart doesn't log massive error attemping to render rect with negative height.
Merge pull request #55 from midoringo8823/bug_fix

Add a check for height < 0 and and force height to be 0 so bar chart doe...
Merge pull request #54 from midoringo8823/pie_legend_options

Add an option for displaying {percentage, value, or value(percentage)} f...
up the release number for pull
Merge pull request #56 from midoringo8823/release

up the release number for pull