Add Spineless.js app for review

Hi. I have been working on a DOM-based framework called Spineless.js for building complex UIs and decided to implement TodoMVC. It was surprisingly simple to do so I thought I would submit it and get some feedback.

I tried to follow the contribution guidelines as much as possible, let me know if I buggered something up.

See http://louisstow.github.com/Spineless/ for more information about the framework and a live demo here: http://louisstow.github.com/Spineless/examples/todo.html

Cheers!