isobj changed to explicit istype /obj
added extra frames to blast door animation so it doesn't restart
removed ZAS vars from /door/, added missing vars to door subtypes
adjusted layers of doors, removed layer varedits on maps
added a few defines and helpers
do_after family supports callbacks
added airlock security levels to airlocks
obj_integrity for doors, door assemblies, firelock frames
vault door assembly is 8 plasteel up from 6
explosion_block works better
heavy firelocks block explosions, firelock (de)construction uses crowbar instead of welder
xenos can open airlocks
minor change to attacking obj message
make environment_smash into bitflags
add obj_damage for simple animals
make default max_integrity and obj_integrity INFINITY for non-defined objects, until we can move more objects to obj_integrity/take_damage() system
adds examining objects to roughly check damage
more obj_defense.dm procs
tables can be attacked with items, glass tables have a narsie_act()
fixes, changes to make it compile
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
