Sudokus

![screen shot 2014-12-23 at 23 36 16](https://cloud.githubusercontent.com/assets/1001642/5544369/1d344078-8afd-11e4-9622-6451c58ab057.png)

Ho ho ho ... merry Christmas ... 

Missing:

* Data - I'm talking with @cantlin & Robert Hahn about getting that from our providers at the moment. If they won't provide us with a feed we might need to make an admin panel with which to enter them.
* SVG icons for the 'erase' button and a button that toggles between entering solutions and jotting possible solutions.
* A sensible solution for routing, as these URLs don't follow a simple pattern in the way crossword URLs do.
errrr - this is not its final home is it?