Fixes #291 - Task Code is no longer required in the UI.

However, when a code is specified, it’s subject to a unique constraint.
Merge branch 'bug/291'
Closes #298 - Documentation updated to clarify purpose of resubmit_task_instance.
Merge branch 'bug/298'
Closes #295 - LoginID now included in list_users API/command.
Merge branch 'enhancement/295'
Closes #293 - documentation updated to clarify code is only available in json and xml results.
Merge branch 'bug/293'
Fixes #290 - text api output now includes delimiters when values are empty.
Merge branch 'bug/290'