Style: use <time> and move 'more' link up

* Use <time> wherever we show a date
* Add some elements and css to move the 'more' link closer to the
  summary.

### Before
![image](https://f.cloud.github.com/assets/26855/247510/0bac5c00-8ae1-11e2-86b4-4c335a969ce3.png)


### After
![image](https://f.cloud.github.com/assets/26855/247506/d71cc0ec-8ae0-11e2-8812-ec3c29170618.png)