Dpawluk/namecallback

@jstjoe 

Added support for pulling in Assignee name and utilizing it in the results UI as well as including it in the CSV. Risk of merging - low(ish)
-If no name, link w/id will use ID instead of name
-CSV will produce an assignee_name field with 'undefined' for name if no name (although I'm pretty sure this isn't possible, should always be something).

Please test and let me know what you think :smile: