#184 custom highlight colors fix

After #184 I realized that if the user changed the highlight color, the rounded border would come out really really ugly.
![CSS does not account for the possibility of different highlight color.](https://f.cloud.github.com/assets/3758364/1241022/dec9557e-2a15-11e3-8bc3-f551bd07248f.png)
This patch fixes the issue by moving the ```border-color``` definition to the style tag of the relevant element. I also fixed another oversight in that only games that were highlighted for being owned or being wishlisted would benefit from the rounded borders - this means that now, games highlighted for whatever reason get the rounded borders, and in the right color.