Adds comments, changelog.

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

@@ -1,3 +1,8 @@
+/* 
+Telecrystal item
+Does nothing if not suitable antag type, checks for accept_tcrystals = 1 in a mob's mind.
+For new antags, make sure to add "player.mind.accept_tcrystals = 1" if you want tradable tcrystals.
+*/
 /obj/item/device/telecrystal
 	name = "Red crystal"
 	desc = "A strange, red, glowing crystal."
@@ -7,7 +12,7 @@
 	force = 5
 	
 /obj/item/device/telecrystal/attack_self(mob/user as mob)
-	if(user.mind.accept_tcrystals)
+	if(user.mind.accept_tcrystals) //Checks to see if antag type allows for tcrystals
 		user.mind.tcrystals += 1
 		qdel(src)
 	return