correct detection of deleted users
correct detection of deleted users

API does return an owner object for deleted users: it looks like 
 `"owner": { "user_type": "does_not_exist", "display_name": "user31373" },`
So instead of checking for "None" (which API isn't going to return anyway), we should check the existence of a link to user profile
NickVolynkin/SmokeDetector,ArtOfCode-/SmokeDetector,Charcoal-SE/SmokeDetector,ArtOfCode-/SmokeDetector,NickVolynkin/SmokeDetector,Charcoal-SE/SmokeDetector