Various fixes. Also implementing Chinsky's idea on how to nerf tasers

Cobpipe fix.
Smoke pipe fix (Missing icon)
Eye-stabbing not being logged? Now it is.
Added a check for electrodes in human_defense.dm - if the limb hit has clothing, and that clothing's siemens_coeffecient is 0, the taser electrode will not stun them.
Added seimens_coeffecient=0 to several clothings, items, armors, etc, where it'd make the most sense.