Airbreak support - Added gem and an .rb

The link to the portal is [here:]( https://spokenvote.airbrake.io/projects/86836/groups).

It appears they only allow a single user under the free plan. Any thoughts how we should best use this free account / where we should document the portal for reference?
![Screen Shot 2013-02-20 at 4 30 38 PM](https://f.cloud.github.com/assets/2165336/178556/c66d7b6e-7bbe-11e2-8095-d001f1f472c6.png)