Removed tonal colourings for tag lozenges 

The tag lozenges no longer have tonal colourings (e.g. no orange text on comment pieces).

![screen shot 2014-09-24 at 16 22 24](https://cloud.githubusercontent.com/assets/2236852/4390625/9b19461e-43fe-11e4-8b58-187dd79ca20c.png)