A minimal example of Backbone.js.
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://underscorejs.org/underscore-min.js to a secure url
Modified http://backbonejs.org/backbone-min.js to a secure url
https://d3js.org/d3.v3.min.js
https://underscorejs.org/underscore-min.js
https://backbonejs.org/backbone-min.js