prettifying game link highlighting + tags

(See: jshackles/Enhanced_Steam#183)

In both images, top is before, bottom is after.

Highlighting:
![Highlighting. Top is before, bottom is after.](https://f.cloud.github.com/assets/3758364/1234070/cd75e13e-2957-11e3-9b61-94f634d2a4df.png)

Tags:
![Tags. Top is before, bottom is after.](https://f.cloud.github.com/assets/3758364/1234074/84cad0b0-2958-11e3-94b1-6351ec968ed7.png)