Fix display of term description in term page.

#6110 

This PR makes the term description appear on term pages. (No 1. in the issue above).

After adding a description to a term it now shows up on the term page:
![selection_163](https://cloud.githubusercontent.com/assets/4497748/2953955/7b89ce72-da68-11e3-9cca-ca37e8f7ad39.png)
![selection_162](https://cloud.githubusercontent.com/assets/4497748/2953956/82538fea-da68-11e3-924e-bced980d624c.png)