Buff/discount the .22 pistol

[Roomba]

Yesterday someone emptied almost a full clip into me, and I easily survived long enough to drag myself to the nearest medkit and patch myself up. It doesn't seem very effective for the TC cost, really. The radbow/sleepypen are cheaper/cost the same, stealthier and more effective at actually damaging people. I think it could probably be lowered down to about 3 tcs, or given some kind of damage boost.