Added a 'more...' link to the list of tags.

Which surprisingly shows more tags...

![hidden](https://cloud.githubusercontent.com/assets/76709/2974509/201dbf1c-db8a-11e3-942c-d3b261b1c48c.png)


![expanded](https://cloud.githubusercontent.com/assets/76709/2974510/2391a00a-db8a-11e3-8538-9e61fcdb52f0.png)