Here, we need to actually save the draft into the database by using:

`func SaveDraft(db *gorm.DB, author, list, subject, textbody, htmlbody string) error`

so it will look something like: 

`maillist.SaveDraft(c.Txn, author, list, subject, textbody, htmlbody)`

`MaillistSaveDraftPost` arguments should be `(author, list, subject, textbody, htmlbody string) revel.Result {'

this means we also need to change the front end form/JS to match