A messy experiment. There will be bugs.
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js to a secure url
https://d3js.org/d3.v3.min.js
https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js