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

code/game/objects/items.dm

@@ -40,6 +40,14 @@
 	var/list/allowed = null //suit storage stuff.
 	var/obj/item/device/uplink/hidden/hidden_uplink = null // All items can have an uplink hidden inside, just remember to add the triggers.
 
+	/* Species-specific sprites, concept stolen from Paradise//vg/.
+	ex:
+	sprite_sheets = list(
+		"Tajaran" = 'icons/cat/are/bad'
+		)
+	If index term exists and icon_override is not set, this sprite sheet will be used.
+	*/
+	var/list/sprite_sheets = null
 	var/icon_override = null  //Used to override hardcoded clothing dmis in human clothing proc.
 	var/list/species_fit = null //This object has a different appearance when worn by these species
 

code/game/objects/items/devices/modkit.dm

@@ -0,0 +1,57 @@
+#define MODKIT_HELMET 1
+#define MODKIT_SUIT 2
+#define MODKIT_FULL 3
+
+/obj/item/device/modkit
+	name = "hardsuit modification kit"
+	desc = "A kit containing all the needed tools and parts to modify a hardsuit for another user."
+	icon_state = "modkit"
+	var/parts = MODKIT_FULL
+	var/list/target_species = list("Human","Skrell")
+
+	var/list/permitted_types = list(
+		/obj/item/clothing/head/helmet/space/rig,
+		/obj/item/clothing/suit/space/rig
+		)
+
+/obj/item/device/modkit/afterattack(obj/O, mob/user as mob)
+
+	if(!parts)
+		user << "<span class='warning'>This kit has no parts for this modification left.</span>"
+		user.drop_from_inventory(src)
+		del(src)
+		return
+
+	/* TODO: list comparison
+	if(istype(O,to_type))
+		user << "<span class='notice'>[O] is already modified.</span>"
+		return
+	*/
+
+	if(!isturf(O.loc))
+		user << "<span class='warning'>[O] must be safely placed on the ground for modification.</span>"
+		return
+
+	playsound(user.loc, 'sound/items/Screwdriver.ogg', 100, 1)
+
+	user.visible_message("\red [user] opens \the [src] and modifies \the [O].","\red You open \the [src] and modify \the [O].")
+
+	var/obj/item/clothing/I = O
+	if(istype(I))
+		I.species_restricted = target_species.Copy()
+
+	parts--
+	if(!parts)
+		user.drop_from_inventory(src)
+		del(src)
+
+/obj/item/device/modkit/tajaran
+	name = "tajaran hardsuit modification kit"
+	desc = "A kit containing all the needed tools and parts to modify a hardsuit for another user. This one looks like it's meant for Tajara."
+	target_species = list("Tajaran")
+
+/obj/item/device/modkit/examine()
+	..()
+	usr << "It looks as though it modifies hardsuits to fit the following users:"
+	for(var/species in target_species)
+		usr << "- [species]"