HTML5 version of Martin's heatmaps. One in Rack view, and the other in the same format as Martin's one.
www/heatmap.html (Rack View) and www/heatmap4.html (Table View)
are the two actively used pages.
Martin's bin/heatmapjson.py and the derived bin/heatmapjson2.cgi are in this repo for reference, but the master copies are in Martin's repo.