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.
Ugly, I know, but I haven't quite decided on how I want to articulate the components of this SVG. If I decide to go crazy with behavior I might model SVG objects, or I maybe use a fixture object to store groups of coordinates, or maybe even just store arrays of coordinates within the view. We'll see.