Polishing intro
geom_text is a subclass of geom_point
Add points method for geom_point.
Describe potential transforms in a bit more detail.
Don't use wrapper for bars
Note about reparameterisation
Ribbons should use coords class
Implement stacking for ribbons
More rewriting of vignette
Flip doc improvements
Note geom_area in vignette
Add render_spoke
Always include original points when warping

Unsurprisingly this looks much better