Multiple buddies per dive

[Mikko Rasa]

In my diving club, it's fairly common to dive as a triplet rather than a 
pair if there's an odd number of people participating on the trip.  At 
the moment subsurface only supports one buddy per dive.  Surely I can't 
be the only one who would benefit from support of multiple buddies?  I'm 
not sure when I can find the time to implement this myself, so feel free 
to consider it as a feature request.

-- 
Mikko