Usage stats are now an ordered list of breakdown by reasons

As below:

- This Month
- Last 3 Months
- Last 12 months
-All downloads

Also, the testing stats are shown in grey.

![image](https://cloud.githubusercontent.com/assets/1578598/4414427/c7e0f970-4517-11e4-91bc-8d6b709dfe83.png)