Portable flashers can now burn out their flashbulbs (4% chance)

Additionally,
-Flashbulbs can be removed using wirecutters and replaced with a working flash
-EMPs cause flashbulbs to burn out
-Portable flashers now appear disabled when not anchored, if there is no flashbulb, or if the flashbulb is broken
-Added sounds for wirecutting and wrenching
-Added spare flashes in the security weapons crate from cargo to compensate.
-Updated changelog

Intended to cut down on "set it and forget it" style of lining the brig with these things by requiring some level of maintenance.