Defib, vox fix, burst/lawgiver bugfixes

Vox no longer die to death as soon as they inhale any O2.  It's still
painful, but not as painful.
Defib added.  After someone dies of suffocation, you have five minutes
to give them the zap.  Works better on nakeds.  Works poorly on clothed
and armoreds.
Detective revolver nerf.  Because die.