Uninitialized constant when used with Rails 3

[alto]

Hey, as described in ticket no. 87 (see https://rails.lighthouseapp.com/projects/8995-rails-plugins/tickets/87), when using exception_notification middleware with Rails, you get an "Uninitialized constant" exception. Lawrence Pit provided the patch, which I just put as a pull request.

[smartinez87]

Hey @alto, the official repo is now https://github.com/smartinez87/exception_notification, and this has already been fixed there.

Thanks for your contribution!