Homepage SVG

Adds the a rough prototype of the SVG feature that I want on the front page with a new 'tangoes' view.  Added index template to put svg and other homepage content in.

There should now be a heart-shaped geometric object rendered in the top-level index route:

![screen shot 2014-10-04 at 2 51 30 pm](https://cloud.githubusercontent.com/assets/1061456/4516783/4cd7b4ba-4c08-11e4-868c-50f443fdf118.png)