Problem: Try to add a click event handler

This is the simplest thing that could possibly work. We don't use jQuery
yet. This is deliberate to keep things simple, even though the looping
code is pretty gnarly.
Solution: Set classname of table cell
Enhancement: Introcuce simple end-to-end jasmine test

Note, this deliberately uses basic assertions, we'll replace them next
Refactor: replace Error assertions with jasmine ones
Refactor: Introduce jQuery into the game
Refactor: introduce jQuery into the spec