Removed box shadows for the waterfall

Hello Rafael,
wow really like your recent changes :)

I've made a suggestion removing the box shadows/rounded corners for the waterfall, making it even a little more tighter. I think it's easier to read but it depends on what you like. Use it if you want.

![screen shot 2014-04-29 at 08 01 53](https://cloud.githubusercontent.com/assets/540757/2826057/ec647cc4-cf63-11e3-9534-34079790a858.png)

Best
Peter