Add country names to provider details (bug 996085)

![compatibility___payments___test_app__hartebeest3204____firefox_marketplace](https://cloud.githubusercontent.com/assets/1514/2723314/a6d1478a-c592-11e3-9fd5-5d682580f473.png)

Getting the data felt clunky, I'm more than happy to take suggestions on improving that.

The display could use a few tweaks. I'll tidy that up tomorrow along with making the 'p' conditional.