https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js
https://cdnjs.cloudflare.com/ajax/libs/nvd3/1.7.0/nv.d3.min.js
https://code.jquery.com/jquery-2.1.3.min.js
https://www.google.com/jsapi