Prevent three scores being shown in the widget at the same time

![Screenshot from 2013-02-04 22:21:12](https://f.cloud.github.com/assets/1097349/125660/27add248-6f1c-11e2-848e-023bd18910a3.png)

This should fix #391

On [the widget page](http://www.reddit.com/widget) the additional scores are hidden using an external stylesheet, this patch hides them using inline styles if it's appropriate to do so and will work on non reddit.com websites.

I didn't test with buttons that allow voting as it's hassle to set up, but as far as I can tell they use iframes and separate templates in `r2/public/static/buttons` and shouldn't be broken.