Discussion comment redesign

# Open: Discussion redesign

We've redesigned the comments.
Most of the HTML has stayed the same.

We have moved top comments over to use the content of the normal comments.
This way we have one set of markup. Bonza!

## Looky

Thread:

![thread1](https://f.cloud.github.com/assets/960919/1783732/7a773244-68c7-11e3-9dba-d1e5315332c5.png)
![thread2](https://f.cloud.github.com/assets/960919/1783733/7a780e08-68c7-11e3-870e-ef0ca556369c.png)
![thread3](https://f.cloud.github.com/assets/960919/1783734/7a785eee-68c7-11e3-83b9-e38ba21a9f8c.png)
![thread4](https://f.cloud.github.com/assets/960919/1783735/7a793044-68c7-11e3-88f0-5ded68225ebf.png)

Top comments:

![topcomments2](https://f.cloud.github.com/assets/960919/1783740/8583501e-68c7-11e3-9336-db1d33cf147c.png)
![topcomments1](https://f.cloud.github.com/assets/960919/1783741/858372f6-68c7-11e3-9aaf-ae001a99e1c0.png)
![topcomments3](https://f.cloud.github.com/assets/960919/1783742/8583ccce-68c7-11e3-982f-ee588c4dde06.png)
![topcomments4](https://f.cloud.github.com/assets/960919/1783743/85850e04-68c7-11e3-89ac-a5280f47bf3b.png)

![showmorereplies](https://f.cloud.github.com/assets/960919/1783762/b8fd3c98-68c7-11e3-8866-06b0e8ed32a9.png)