Make BioDalliance less giant on short screens

Fixes #117.

Before: 
![short-screen-before](https://cloud.githubusercontent.com/assets/98301/4621666/00f54408-532f-11e4-8d3e-b50b3498e76a.png)

After:
![short-screen-after](https://cloud.githubusercontent.com/assets/98301/4621670/02b9464a-532f-11e4-9f6a-0f7ad363604e.png)