Fronts: media item tweaks

 * remove 'Gallery'/'Video' text
 * remove meta
 * remove bg colour at mobile

## Mobile

![media-mobile](https://f.cloud.github.com/assets/74132/2161039/a76a5b7a-94c1-11e3-82dc-44759a37c6a4.jpg)

## Desktop

![media-desktop](https://f.cloud.github.com/assets/74132/2161044/ace21ac0-94c1-11e3-95d7-93cb6e8193a2.jpg)