Bug 1033659 - Update Task API to include the newly added fields to Task ...

Task Creation with newly added fields and keywords.
It's great that you were able to figure out how to pass `team`, `project` and `type` by name into the API method, instead of having to use a primary key. Can you try to see if there is a way to do the same for `difficulty`, so a consumer could pass `EASY` instead of `1`?