Currency: Display tile view if only the currency is given, i.e., "usd"

Tests:
http://www.browserstack.com/screenshots/6e395e50a96c32d3440c0d2883f31cf9f8198f2f
http://www.browserstack.com/screenshots/d7d3d598b9fc9b8d8aeb2f6c1469b37fd2ef0646
http://www.browserstack.com/screenshots/54a94a6d36dde26e467157b3adcaa6a5f62b52d8
http://www.browserstack.com/screenshots/3e359c0a54f09d3d54762a0398e56a2c440ed4ca

![screen shot 2014-11-06 at 4 08 06 pm](https://cloud.githubusercontent.com/assets/81969/4943924/04736e02-65f9-11e4-8f8c-7948b8f24292.png)