Fixed styling issues in statistics tab - Image size & name tags

The PR fixes image styling issues on achievement images in statistics tab as they are not sized properly in firefox. This fixes #232 

Also added some top padding to style the name tags. 

Before:
![screen shot 2014-10-03 at 11 42 01 am](https://cloud.githubusercontent.com/assets/4353853/4502084/6e81d204-4abd-11e4-9096-9bfffc0a5420.png)

After:
![screen shot 2014-10-03 at 1 24 34 pm](https://cloud.githubusercontent.com/assets/4353853/4502096/ab2191f4-4abd-11e4-8278-fcde00ed4ea8.png)