Fix failing spec: Call Zuora to get Account objects

Spec was comparing Relation to Account.
Add travis yml config, set travis up to run zuora integration tests
Merge pull request #21 from nvd/bug/ns_fix_failing_spec

Fix failing spec: Call Zuora to get Account objects
Merge remote-tracking branch 'origin/master' into add-travis-yml
Fix integration test by calling to_a since the rspec expect syntax doesn't seem to trigger that.
Merge pull request #23 from sportngin/add-travis-yml

Add travis yml to run the integration tests as well as run against multiple versions of ruby