Style case-study page

Add some styling for a case study show page.

- Setup IE specific stylesheets
- Improve the slimmer setup
- Add presenter to interpret content store data
- Use components to build show page
- Add minimal styling for things not covered by the show page
That makes more sense, thanks.

I'd be inclined to say the `t` call should happen in the view rather than presenter/controller, but thats based on what i've seen else where in rails apps, still quite reckon-y