nanotrasen to gato

Replaced most instances of Nanotrasen mentions into GATO, though I've kept some that have more sense to be kept as Nanotrasen (like nanotrasen marked stuff and such)

code/modules/awaymissions/capture_the_flag.dm

@@ -16,7 +16,7 @@
 	item_state = "banner"
 	lefthand_file = 'icons/mob/inhands/equipment/banners_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/banners_righthand.dmi'
-	desc = "A banner with Nanotrasen's logo on it."
+	desc = "A banner with GATO's logo on it."
 	slowdown = 2
 	throw_speed = 0
 	throw_range = 1
@@ -114,7 +114,7 @@
 	name = "banner landmark"
 	icon = 'icons/obj/items_and_weapons.dmi'
 	icon_state = "banner"
-	desc = "This is where a banner with Nanotrasen's logo on it would go."
+	desc = "This is where a banner with GATO's logo on it would go."
 	layer = LOW_ITEM_LAYER
 
 /obj/effect/ctf/flag_reset/red