Roadmap

v0.6

Continuous color scale (including legends)
coord_flip (support horizontal bar charts)
Implement a method for rendering new points and updating scales only (LiveView optimization)
Draw legend on any side of the plot (top/left/bottom/right)
Implement x_lim/y_lim
ggplot2-ify gridlines approach (breaks, minor breaks)
stat_smooth
Density plots/stats