CHANGES IN VERSION 0.1.5
------------------------
 o set legend order based on order of "cols" <2020-09-09, Wed>
   + https://github.com/GuangchuangYu/scatterpie/pull/28
 o Add in long format option to geom_scatterpie
   + https://github.com/GuangchuangYu/scatterpie/pull/22

CHANGES IN VERSION 0.1.4
------------------------
 o pie_scale parameter in geom_scatterpie <2019-11-08, Fri>

CHANGES IN VERSION 0.1.3
------------------------
 o fixed bug of round_digit

CHANGES IN VERSION 0.1.2
------------------------
 o import rvcheck::get_aes_var to compatible with ggplot2 v < 2.3.0 and >= 2.3.0 <2018-05-23, Wed>

CHANGES IN VERSION 0.1.1
------------------------
 o compatible with ggplot2 v=2.2.1.9000
 o import rlang and use tidyeval with tidyr::gather <2018-04-18, Wed>
   + https://github.com/GuangchuangYu/scatterpie/issues/9

CHANGES IN VERSION 0.0.7
------------------------
 o add parameter `sorted_by_radius`.
   + https://github.com/GuangchuangYu/scatterpie/issues/7

CHANGES IN VERSION 0.0.7
------------------------
 o add labeller parameter in geom_scatterpie_legend <2017-03-21, Tue>

CHANGES IN VERSION 0.0.6
------------------------
 o bug fixed of geom_scatterpie_legend <2016-02-14, Tue>
   + https://github.com/GuangchuangYu/scatterpie/issues/3

CHANGES IN VERSION 0.0.5
------------------------
 o add examples in geom_scatterpie <2016-12-02, Fri>
 o recenter to set the center of map data <2016-12-01, Thu>
 o geom_scatterpie_legend <2016-12-01, Thu>
 o geom_scatterpie <2016-11-30, Wed>