Don't show cents on leaderboard after $1000

Fixes this: (theoretically. I don't know how to simulate this situation in my development environment :frowning:)

![screen shot 2014-02-27 at 3 39 27 pm](https://f.cloud.github.com/assets/688886/2288280/d5df37f0-9ff7-11e3-868e-d8193659d560.png)