Moved all region plotting data to JSON files hosted locally.
This is retrieved using AJAX, plotted and the rails-hosted stats are then included.
By doing this, the load time has reduced by about five times with room for improvement left. The JSON is still a little large so needs optimising, but that is easy enough to do. The colours need sorting out, they are still broken. Another possible improvement is to delay the ward loading until zoomed in, then only load the features in view. Given that I can probably save another second or so just on JSON and rails optimisations, I'll probably leave it as it is right now.

Merging this commit over to master, js-refactor is pretty much there to warrant a new version.