Updated visit data with corrected dates and pint prices
Requirejs-ified javascript.
Remove dependency on jquery
Load leaflet via requirejs
Calculate and draw Voronoi graph.

Basic version using lat/lon, would be better with cartesian coordinates.
Calculate Voronoi graph from cartesian coordinates.

Works but code needs tidied up.
Colour voronoi regions in by price
Extract colourLinear()
Better colouring of voronoi and tamed voronoi boundaries.
Fix median calculation

...and tweak some colours etc.
Colour changes, hide unused layers.
Tweak legend to show prices
Minor optimisations and a colour tweak.
Tweaks to price formatting and other bits
Knocked out Timberyard and Shandwick's prices (dearest and cheapest respectively).

They make the rest of the graph look too flat!