IPLookup: Standardise CSS Styles. Remove Custom CSS

Fix for #1289

![image](https://cloud.githubusercontent.com/assets/5282264/5230448/6ac8b2a6-7761-11e4-99fe-68b05f95d55d.png)
@chrisjwilsoncom Sorry! Totally misread that; you're only enforcing it if the user has asked for reverse dns; smart! :