• Allow user to exclude particular attributes from a response by passing
  ?exclude_attributes=result,trigger_instance query parameter to the /actionexecutions/
  and /actionexecutions/<execution id>/ endpoint (new-feature)
• Add new /actionexecutions/<id>/attribute/<attribute name> endpoint which allows user to
  retrieve a value of a particular action execution attribute. (new-feature)
• Update execution get CLI command so it automatically detects workflows and returns more
  user-friendly output by default. (improvement)
• Update run, action execute, execution get and execution re-run CLI commands to
  take the same options and return output in the same consistent format.
• Fix a bug with http runner not parsing JSON HTTP response body if the content-type header also
  contained a charset. (bug-fix)
• Indent workflow children properly in CLI (bug-fix)
• Make sure that wait indicator is visible in CLI on some systems where stdout is buffered. (bug-fix)
• Fix a bug with end_timestamp attribute on the LiveAction and ActionExecution model
  containing an invalid value if the action hasn't finished yet. (bug-fix)
• Correctly report an invalid authentication information error in the remote runner. (bug-fix)
• Throw a more friendly error in the action chain runner if it fails to parse the action chain
  definition file. (improvement)
• Fix a bug in the action chain runner and make sure action parameters are also available for
  substitution in the publish scope. (bug-fix)