Forked from robschmuecker's block: Clickable link Drag and Drop zoomable D3.js tree example.
Modified http://code.jquery.com/jquery-1.10.2.min.js to a secure url
Modified http://d3js.org/d3.v3.min.js to a secure url
https://code.jquery.com/jquery-1.10.2.min.js
https://d3js.org/d3.v3.min.js