Smart banner stylings for iOS

Smart banner renders on IOS if you are using chrome, so this was a best attempt to adhere to the IOS style guidelines.

Example usage:

![screen shot 2014-12-15 at 4 59 22 pm](https://cloud.githubusercontent.com/assets/422184/5444762/ea3b3154-847b-11e4-8a52-ae0844c4852c.png)