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
With these lighten colours - to prevent `lighten($c-neutral1, ANYTHING)` - could you have something like `$c-neutral1--shy`?