Adding Coveralls support

This is to see the spec/test coverage
SimpleConv to check coverage
Merge branch 'mongoid_fix'

* mongoid_fix:
  Mongoid fix
Same Travis standard as Delayed Job itself

We are a plugin for Delayed Job, so we should work on the same platforms as they do
Old style hash for 1.8.x compatiblity
We need the dev stuff
Noticed deprecated gemcutter

As Travis advises;
The source :gemcutter is deprecated because HTTP requests are insecure.
Please change your source to https://rubygems.org if possible
Merge branch 'refs/heads/multi_travis'

* refs/heads/multi_travis:
  Noticed deprecated gemcutter
  We need the dev stuff
  Old style hash for 1.8.x compatiblity
  Same Travis standard as Delayed Job itself
  SimpleConv to check coverage
  Adding Coveralls support