Refactor client implementation of job details
Add spec.  Remove unnecessary code
Reference the model, not the response
Negative spec example added
Create cb_client instance var on construction
Nulling the response completely for neg test
Merge branch 'master' of github.com:cbdr/ruby-cb-api into job_client_refactor
Minor version bump
Merge pull request #36 from cbdr/job_client_refactor

Job client refactor