Video quality preview on thumbnails.

[mzso]

Hi!

I think this is one of the most unique and useful features of YTC, so I thought I'd open an issue for it.

(The animating thumbnails with video content feature can also be quite useful)

[YePpHa]

I will need to consider how to properly do requests to YouTube for video config data before I will implement this. I will definitely have more than one module make a request for the same data. So this data needs to either be cached or abstract video data outside modules.