[MAP] Adds WJ's blastdoor sprites, recodes blast doors.

Shutter and blastdoors are now in separate dmis.

Updates blastdoor and shutter code to reduce duplication. Standardised, as usual.

Moves var/autoclose and proc/autoclose() from /obj/machinery/door to /obj/machinery/door/airlock, which is the only thing that uses it.

Fixes capitalisation on a bunch of default airlock names.

Comments out /obj/machinery/door/poddoor/filler_object.

UPDATES THE MAP! Holy shit this took forever please don't make me redo the map changes. All open instances now use the /preopen type.