mapbox/tilemill — pull request #1469 by ian29 (2012-05-10 22:58:04+00:00)
Title: add heatmap how-to

creates a heatmap how-to here: https://github.com/mapbox/tilemill/blob/heatmap/_posts/docs/guides/0203-01-01-designing-heat-maps-with-tilemill-and-qgis.md