use justify on blocks of text on sessions page

Before:
![screen shot 2014-05-13 at 7 21 49 am](https://cloud.githubusercontent.com/assets/253647/2957061/e0d76010-da99-11e3-9bfc-fc608a057d60.png)

After:
![screen shot 2014-05-13 at 7 21 24 am](https://cloud.githubusercontent.com/assets/253647/2957063/e6b70918-da99-11e3-858e-d8f58c549e44.png)