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
I'm not too familiar with rails i18n, but this line feels quite dense. 

Also, bit confused by the `count: 10`, it _looks_ like thats trying make it be plural, but why 10 rather than 2 (or 0?)