Add container property to popovers, update detail page title, update urls to the plato repo

* Add a container to the popovers so that they don't inherit the header
styling of their parents
* Update the title of the file detail page to use the short filename
* Update the path to the plato project in the overview and file templates

**Before:**
![popover-before](https://f.cloud.github.com/assets/802574/1518056/72968644-4b2e-11e3-938f-2684841db242.png)

**After:**
![popover-after](https://f.cloud.github.com/assets/802574/1518057/75c1263a-4b2e-11e3-83a7-73d5239863b8.png)