Remove dependency on PulsarJob.output in tests
Replace PulsarJob.output with PulsarJob.stdout and PulsarJob.stderr
Return PulsarJob.output to union stdout, stderr, combined outputs.
Revert: Return PulsarJob.output to union stdout, stderr, combined outputs. (bc0c6138ad9d9892a7f07b74aaf980d6f54ccf53)
Save stdout and combined output in PulsarJob.
Merge pull request #30 from vogdb/issue-30

Store two task outputs: combined, stdout