Halyard 0.5.0

Fixes

• Account Id flag for AWS is now formatted as --account-id rather than --accountId for consistency.
• Docker username is now picked up by hal.

Features

• Docker validator now ensures you have tags to cache & deploy.
• Help text is introduced for fixing trailing/leading passwordFile newlines.
• New help text for top level hal command to guide a new user.
• Halyard can deploy an OAuth2-authenticating Spinnaker to Kubernetes.
• Spinnaker services in Kubernetes now have readiness probes.
• Config & endpoint information is backed up by Halyard during config generation.
• Basic Google Rosco Support has been added.
• Halyard can now write to storage buckets when provided with the right credentials.