Adds point-blank shooting

Adds point blank shooting, now you can shoot anyone even if they are on
the same tile or one tile from you. On harm intent, you BUTT-STROKE or
PISTOL WHIP (military terms!!) people with the gun, allowing for not
quite harmful floggings.

Makes gun.dm less shit.
mergending
Adds missing newline
Merge pull request #3376 from VistaPOWA/point_blank

Adds point blank shooting