Updated missing url https://raw.githubusercontent.com/mbostock/d3/master/lib/colorbrewer/colorbrewer.js to https://cdn.jsdelivr.net/gh/mbostock/d3/lib/colorbrewer/colorbrewer.js
https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js
https://raw.githubusercontent.com/mbostock/d3/master/lib/colorbrewer/colorbrewer.js