added styling for the new smileys

first go at cleaning up

This removes the weird image mechanism and uses an AJAX requests
instead. I'm not sure why this didn't occur to me in the first place.

I removed the scores from the sitemap

first go at cleaning up

This removes the weird image mechanism and uses an AJAX requests
instead. I'm not sure why this didn't occur to me in the first place.

I removed the scores from the sitemap for now. Not sure if they'll come
back. The admin interface should be good enough as a replacement.

Icons are now SVG - no more themeing. You can use CSS for that. Proper
styling in another commit.

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