catocommon - send email function logging turned down to 'debug' level
API - fixed datastore get/set documentation
rolled back an incorrect change
Moved the delete users code to the catouser lib, so it can be accessed by the API.
reduced the debug level of a message on import_backup
Fixed an issue with create_task_from_json where task_code was null
test.py script now tests all Cato functionality except running tasks.