switch reviewers app history to use comm api (bug 920746)

**Notes:**

- Need to technically figure out how to display attachments.

![screen shot 2014-01-08 at 6 39 35 pm](https://f.cloud.github.com/assets/674727/1874645/4a98a862-78d7-11e3-964f-10e04a2bc198.png)