Refactored hitby to be in line with TG's version.
Refactored item weight defines to a more clear naming scheme, also in
line with TG's version.
Refactored how the movement bumps are handled, ported signals to handle
them, in preparation for the movement update.
Fixed disposal hit bouncing the hitting atom on the wall.
Items do not push other items anymore if they are tiny.
Mechs now take MUCH less damage when dropping down z-levels, and the damage is now properly applied to only the legs.
Fixed mech damage being applied randomly instead of to the targetted component.
tweak: "Security's base nonlethal equipment - tasers and rubbers - is now a bit better."
bugfix: "Fixed teargas doing practically nothing."
bugfix: "Fixed a lot of stuff not applying pain damage. Ow."
bugfix: "Fixed undefined values on the CMC."
bugfix: "Fixed dionae not regenerating damage."
Spent lots of time and lots of changes to fix issues:
bugfix: "Mechs no longer runtime during destroy call."
bugfix: "Turrets and NPCS no longer target empty mechs."
bugfix: "Mechs no longer runtime during armor check. Mechs now use their armor and values for it. Before it would ignore them entirely and deal 100% damage."
Added ismech() define and also QDEL_NULL_LIST() define from TG. Matt's suggestion
renamed any armour references in mech code to armor to keep it consistent
