General bugfixing.

Created by: ComicIronic

I don't really get this if statement in policetape, but it should be fixed now maybe. Added a proc for checking if two stacks can merge, used it on coloured cables. Fixes #4156 (closed). Made the welding damage message list the item intensifying the damage. Fixes #4187 (closed). Added Vox exclusion to RIG helmets, removed it from Wiz and Nukeops hardsuits. Fixes #4790 (closed), fixes #4756 (closed), fixes #4496 (closed). Orebag now only gives borgs a message if it finds ore. Fixes #4150 (closed). Throws something at #4267 (closed), hardcode is bad and everyone should feel bad.