Front view more button

Show more button has the similar style to comments button + includes context.
![screen shot 2014-10-21 at 20 03 15](https://cloud.githubusercontent.com/assets/2579465/4724929/2432f164-5955-11e4-8b73-8b0adf8813ef.png)

![screen shot 2014-10-21 at 20 03 28](https://cloud.githubusercontent.com/assets/2579465/4724930/29bff866-5955-11e4-86c3-4b501ae39a83.png)

I have also added unit tests for this functionality.