Admiring Jason Davies' work on the Weichel projection
forked from enjalot's block: visualizing map distortion
forked from enjalot's block: d3.geo.weichel
https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js
https://cdnjs.cloudflare.com/ajax/libs/d3-geo-projection/0.2.15/d3.geo.projection.min.js
https://cdnjs.cloudflare.com/ajax/libs/topojson/1.6.19/topojson.min.js