Change to signfont

Helps differentiate signatures a bit more. Might give more attention to bureaucracy.

![untitled](https://f.cloud.github.com/assets/6071161/2405931/ed40a490-aa5d-11e3-863c-ffedd46910f5.png)
Above is the new, the old, and default + italics.

Unsure if the font is default accessible or if there's going to be
issues.