Add Campfire notifications for Travis CI
Fix .travis.yml file
Remove debugger gem from development dependencies
Update Campfire config for Travis CI
Fix num_desired_heroku_workers not returning integers.

With fast resque jobs and multiple workers, we've seen an edge case
where #num_desired_heroku_workers returns the WORKER_SCALE array instead
of a number.  Somehow the Scale.job_count is zero despite having just
enqueued a job, so our theory is that another worker has already grabbed
the job from the queue while the API call was happening.
Relax our resque version requirement.

It was frozen to the latest version of resque from the time this was
written, which is somewhat old now.  The latest version seems to work
fine. Hopefully they won't break the API in the 1.X series.
Merge pull request #1 from G5/concurrency-bug

Fix num_desired_heroku_workers not returning integers.
Bump version.
 fixes version
Make heroku scale workers down on_failure