Profile and AWS partition support v1.7.1

Features

• Allow role ARN for any AWS partitions #47

  Thanks to @gianlucb for raising this issue!

• Extend profile support
  • List available profiles in help output
  • Use all available profile values by default
  • Use exit codes to signal different failure conditions
  • Update to latest aws-sdk

Fixes

• Make role ARN optional if a profile is available
• Failed while masking info in error logging
• Implement feature request #47

Full Changelog: v1.5.0...v1.7.1