Delete mockup code files
Rename heatmap_overalays.R to FigureS1.R
Rename figure src files correctly
Flip names for fig2 and fig3 src files
Update Fig1.svg
Add new Fig2.svg
Add src file for FigS2
Remove old levelplots

These were with mean marginal plots
Remove abf_pe variants from levelplots
Add new versions of levelplots

Margin plots now with median (free y-axis)
Update Fig2 src file
Correct figure names
Re-organize and re-create Fig2
Add new Fig1 sketch
Add new Fig3
Update planning docs
Remove old levelplots dir