Don't hotlink
Fixed overlaps not loading from state.

Checkbox states need to be set before setting coordinates.
Draw variability region. Fixes #23.
Add lookup table for IDs
Show button refs
Menu heading highlighted on :target
Add prefs for refs
Class for each ref
Ensure empty div if no actual refs
Prepend triangle to refs
Remove indices when more than one ref
Merge branch 'refs'

Conflicts:
	draw.js
Merge branch 'graph-vendor'
Fixed var names in draw.js (changed in 6de420a)
Don't react to arrow + modifier key
Faster arrow + shift key
Merge branch 'variability' of https://github.com/MattiasBuelens/tpp-coords into MattiasBuelens-variability

Conflicts:
	coords.js
	load.js
Use coords2main (changed in 99caf46)
Merge branch 'MattiasBuelens-variability'