Squashed hardsuit and suit cycler commits:
Basic preliminary breach handling.
Breached spacesuits act more sanely and now result in pressure loss.
Preliminary work for upgrading hardsuits.
Adds suit cycler.
Working on breach data for hardsuits.
More tweaks to the suit cycler.
More rig changes/tweaks.

Conflicts:
	code/modules/mob/living/carbon/human/human_defense.dm
Prevented toggling a suit helmet while holding the suit.
Icon reshuffle/rename for following commit.

Conflicts:
	icons/mob/head.dmi
	icons/mob/suit.dmi
	icons/obj/clothing/hats.dmi
	icons/obj/clothing/suits.dmi
Changed by-species icon sheets to by-clothing species-specific icon sheets.

Conflicts:
	code/modules/mob/living/carbon/human/update_icons.dm
	code/modules/mob/living/carbon/species.dm
Lots of work on hardsuits, commented out some broken WIP code, did some renaming, deleted now-redundant species-specific hardsuits.

Conflicts:
	code/game/machinery/suit_storage_unit.dm
	code/game/objects/items.dm
	code/game/objects/items/devices/modkit.dm
	code/modules/clothing/masks/breath.dm
	code/modules/clothing/spacesuits/alien.dm
	code/modules/clothing/spacesuits/rig.dm