Add audio player download/feed links

![screen shot 2014-09-17 at 11 52 52](https://cloud.githubusercontent.com/assets/74132/4302319/d1f5f20a-3e58-11e4-93b3-b7601c6669f8.png)

Icons are becoming a mess - need to sort them out
Yeah, agreed. This colour is actually used all over the dark background pages, so there is a case for having 16% opacity as a standard modifier. I'll discuss with design