HN topcolor 3D visualisation

Quick and dirty HN topcolor visualisation

data, discussion of data, discussion of this

Built with basically zero prior dataviz experience in about an hour on the back of ThreeJS, D3.js and Dex by Howard.

Drag to pan. In chrome you can scroll to zoom.

I had to hack ScatterPlot3D.js to get the colours displaying properly;
// new
pointGeo.colors.push(new THREE.Color("rgb(" + csv.data[i][0] + "," + csv.data[i][1] + "," + csv.data[i][2] + ")"));
// old
pointGeo.colors.push(colors[(j-2) % colors.length]);

Also set opacity to 1 in the `ParticleBasicMaterial` config. As I said, this is quick and very dirty.

Over the weekend I'll probably pick apart the Dex code and expose the color setting stuff so developers can choose their own colours.