Implementation #57 : Display commit timestamps in the project overview

Display commit timestamps in the project overview
Builds upon PR #53 in order to make the Selenium tests work in the new FF.

![screen shot 2014-11-01 at 14 32 29](https://cloud.githubusercontent.com/assets/3469492/4871882/a88c5d50-61cb-11e4-942f-d1417c223d1e.png)