Contribution report

Here's my start on #73 to generate a nice looking report.

![Contribution Report](https://cloud.githubusercontent.com/assets/802117/3103541/23577a46-e658-11e3-848c-5bf52030e98a.png)

I couldn't however figure out the exhibit design pattern thats in use currently with mpdx. If someone can do that for this branch that should fix the issue with the currencies showing up in the wrong format.