ggpie 0.2.4

• Added label_len to adjust the length of labels (Fix #2).
• Corrected some spelling mistakes
• Added nudge_x and nudge_y in ggpie, ggdonut, ggnestedpie to adjust the space between the label and the plot (Fix #3).

ggpie 0.2.0

• Added ggrosepie to create rose pie and donut plot, it can also support single or two variables.

ggpie 0.1.0

• Added ggpie to create 2D pie plot with single group variable.
• Added ggdonut to create 2D donut plot with single group variable.
• Added ggnestedpie to create 2D nested pie plot with two group variables.
• Added ggpie3D to create 3D pie plot with single group variable.