Opal-2393: Uniformized summary stats display

## Categorical 
![image](https://f.cloud.github.com/assets/2565497/2450305/50e5d32a-aeba-11e3-89fc-3491e31e47ca.png)

## Integer/Decimal
![image](https://f.cloud.github.com/assets/2565497/2450362/f0b41f38-aeba-11e3-9310-9b5a2ee5cf0b.png)

## Text
![image](https://f.cloud.github.com/assets/2565497/2450365/00a16ff4-aebb-11e3-98ca-248129360821.png)

## Datetime
![image](https://f.cloud.github.com/assets/2565497/2450344/cfdfcda2-aeba-11e3-8415-f6769de43e06.png)

## Geo
![image](https://f.cloud.github.com/assets/2565497/2450354/df6c160e-aeba-11e3-98f5-5a1edba30fd6.png)