Feature change branding

Needed for theodi/shared#65

As with theodi/signonotron2#8, I swapped out the crown for the ODI logo and changed the font from Gill Sans. It now looks like this:

![publications publisher](https://f.cloud.github.com/assets/109774/1071743/c9c56666-147d-11e3-9840-de706f9ac291.png)