Display improvements in mogstats

Increased the column width of 'class' in files and replication display

Before:
![1414773573](https://cloud.githubusercontent.com/assets/547449/4864520/f5748d4a-611c-11e4-818a-e66291d0b1fd.png)

After:
![1414773604](https://cloud.githubusercontent.com/assets/547449/4864529/ff82e566-611c-11e4-8709-2f8733aaf08e.png)