D3 Visualization Example

I included one of the existing D3 examples (http://bl.ocks.org/mbostock/061b3929ba0f3964d335) just to see what it would be like.  The example is shown to the right (clockwise) to your existing content.

This is a maze that is being turned into a tree.  It's just on a 2D canvas, but the value of this is that it showed its REALLY easy to do.  I just had to tweak the CSS transforms for rotation.

I only have a DK1, so it looks fine for me, but might need tweaking for the DK2.

This doesn't need to be merged into master, I just wanted to show that this is really easy. :)

![image](https://cloud.githubusercontent.com/assets/967725/4724573/ca8546ba-5951-11e4-9f15-44d289642eb0.png)