Accurate crossword thumbnails (the animated GIF will explain all)

![crosswordz](https://cloud.githubusercontent.com/assets/1001642/4835113/0aa75b6c-5fb4-11e4-97aa-a2596f3d9731.gif)

@garynewby gave me the idea.
ordering

plus this led to the `persistence` module - use https://github.com/guardian/frontend/blob/master/static/src/javascripts/projects/common/utils/storage.js for your storage manipulation needs, e.g. contains a more robust `isAvailable` method