Collection show now displays list of files using the normal... 

document list layout. Below are the screenshots showing before and after.

BEFORE 
![screen shot 2014-07-22 at 10 01 23 am](https://cloud.githubusercontent.com/assets/568286/3662488/e07ca6b2-11ca-11e4-9a0d-699d8c94c367.png)

AFTER
![screen shot 2014-07-22 at 9 59 01 am](https://cloud.githubusercontent.com/assets/568286/3662489/e447a9f4-11ca-11e4-8d02-a82389455545.png)


I believe the `render_document_index` allowed us to use the grid view too. This PR may break that functionality.