Show comments added in JIRA as part of a state transition.

Currently, when a comment is add to a JIRA issue as part of a state transition, the comment is not shown in AHA.

This is a real issue for us since the Engineering team adds useful comments in JIRA when they move an issue between states. This means that we constantly need to go into JIRA and see why the issue moved states. 

We have confirmed that the JIRA webhook sends the comment in the body, but AHA doesn't do anything with it.