Added link to the raffler in the header menu

# Why
In #68 it was suggested that maybe a general link to the raffler would suffice. This PR is to discuss that idea.

# How it looks
![screen shot 2014-09-23 at 20 33 22](https://cloud.githubusercontent.com/assets/106844/4377594/5ff9a7bc-4350-11e4-8cf6-b7842a45ca9d.png)