Add 'gone' as a synonym for 'delete'.
Add 'gone' as a synonym for 'delete'.

If a privileged user replies 'gone' to a post of SmokeDetector, there is
no reason to keep it around and it can be removed.

Charcoal-SE/SmokeDetector,Charcoal-SE/SmokeDetector,ArtOfCode-/SmokeDetector,ArtOfCode-/SmokeDetector,NickVolynkin/SmokeDetector,NickVolynkin/SmokeDetector