adds armor to many objects
re-adds the clockcult floor sprite (accidentally removed in another PR)
adds clockcult effects to the clockcult floor
adds clockcult grilles
adds var/broken to /obj/structure
adds unused resistance_flags var
moves burn_state and resistance_flags to flags.dm
more updates to attack code
updated obj_defense.dm procs
moves proc/deconstruct() and proc/take_damage() to obj level, moves a few obj damage procs in with it to new obj_defense.dm
moves plastic flaps to new plasticflaps.dm