Update README.md
Update README.md
[cli] Fix ssh when job name is not given - Fixes #75
[aws_cpi] Move task_checkpoint to helpers
[aws_cpi] Fix bug when deregistering an image
[deployer] Use new retryable helper and print debug info
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  [deployer] Use new retryable helper and print debug info
  [aws_cpi] Fix bug when deregistering an image
  [aws_cpi] Move task_checkpoint to helpers
  [cli] Fix ssh when job name is not given - Fixes #75
  Update README.md
  Update README.md