Usage stats are now an ordered list of breakdown by reasons in the following arrangement:
- This Month
- Last 3 Months
- Last 12 months
-All downloads

Also, the testing stats are shown in grey.
Testing stats is subtracted from the total download counts.
The numbers now right-aligned for better readability.
Merge pull request #30 from sadeghim/master

Usage stats are now an ordered list of breakdown by reasons