New story package design and layout

This PR introduces the new visual design, layout and behaviour of story packages across all content types.

This ties the layout in-line with the facia *card* concept and utilises facia ```items/standard.scala.html``` fragments. Although - as the two pages are still not aligned breakpoint wise - these cards are all scoped under a ```.related``` class to avoid overriding any facia styles.

Most of this work is to allow the real stream on onward journey work to commence, as the story packages are the final piece in the puzzle that hadn't had any desktop loving since we released mdot.

I am intending on releasing this first thing Friday morning (10/01/13), but have opened PR for peer review (which is desperately needed).

@ironsidevsquincy and @kaelig can you please take a look, and @kaelig please refrain from the indentation remarks :wink: 

### Mobile
![screenshot from 2014-01-09 17 00 47](https://f.cloud.github.com/assets/80089/1879824/a5045954-794f-11e3-9e93-4d416ec5b977.png)

### Tablet
![screenshot from 2014-01-09 16 37 42](https://f.cloud.github.com/assets/80089/1879831/af867cea-794f-11e3-8824-3c7244dfd925.png)

### Desktop 
![screenshot from 2014-01-09 16 27 56](https://f.cloud.github.com/assets/80089/1879559/e556d1ca-794b-11e3-9020-bd7d9702aa74.png)