Hydroponics refactor, part 1: Files.

No code actually modified, just moved from all over the place to a module folder.

defines/obj/hydro.dm split:
-Seeds into seeds.dm
-Tools like the analyzer, pest and weedkillers into hydro_tools.dm. Hatches and scythe from defines/obj/weapon.dm moved there too.
-Non-edible plants like nettles into grown_inedible.dm. Special procs in items/weapons/hydroponics.dm moved there.
-Biogenerator and hydroponics tray files moved.

code/defines/obj/weapon.dm

@@ -36,17 +36,6 @@
 	throw_speed = 4
 	throw_range = 20
 
-/obj/item/weapon/corncob
-	name = "corn cob"
-	desc = "A reminder of meals gone by."
-	icon = 'icons/obj/harvest.dmi'
-	icon_state = "corncob"
-	item_state = "corncob"
-	w_class = 2.0
-	throwforce = 0
-	throw_speed = 4
-	throw_range = 20
-
 /obj/item/weapon/soap
 	name = "soap"
 	desc = "A cheap bar of soap. Doesn't smell."
@@ -464,54 +453,6 @@
 	w_class = 2.0
 	origin_tech = "biotech=2"
 
-/obj/item/weapon/hatchet
-	name = "hatchet"
-	desc = "A very sharp axe blade upon a short fibremetal handle. It has a long history of chopping things, but now it is used for chopping wood."
-	icon = 'icons/obj/weapons.dmi'
-	icon_state = "hatchet"
-	flags = FPRINT | TABLEPASS | CONDUCT
-	force = 12.0
-	w_class = 2.0
-	throwforce = 15.0
-	throw_speed = 4
-	throw_range = 4
-	m_amt = 15000
-	origin_tech = "materials=2;combat=1"
-	attack_verb = list("chopped", "torn", "cut")
-
-/obj/item/weapon/hatchet/attack(mob/living/carbon/M as mob, mob/living/carbon/user as mob)
-	playsound(loc, 'sound/weapons/bladeslice.ogg', 50, 1, -1)
-	return ..()
-
-/obj/item/weapon/hatchet/unathiknife
-	name = "duelling knife"
-	desc = "A length of leather-bound wood studded with razor-sharp teeth. How crude."
-	icon = 'icons/obj/weapons.dmi'
-	icon_state = "unathiknife"
-	attack_verb = list("ripped", "torn", "cut")
-
-/obj/item/weapon/scythe
-	icon_state = "scythe0"
-	name = "scythe"
-	desc = "A sharp and curved blade on a long fibremetal handle, this tool makes it easy to reap what you sow."
-	force = 13.0
-	throwforce = 5.0
-	throw_speed = 1
-	throw_range = 3
-	w_class = 4.0
-	flags = FPRINT | TABLEPASS | NOSHIELD
-	slot_flags = SLOT_BACK
-	origin_tech = "materials=2;combat=2"
-	attack_verb = list("chopped", "sliced", "cut", "reaped")
-
-/obj/item/weapon/scythe/afterattack(atom/A, mob/user as mob, proximity)
-	if(!proximity) return
-	if(istype(A, /obj/effect/spacevine))
-		for(var/obj/effect/spacevine/B in orange(A,1))
-			if(prob(80))
-				del B
-		del A
-
 /*
 /obj/item/weapon/cigarpacket
 	name = "Pete's Cuban Cigars"