Add npc_data directory and error logging bugfix

npcf/README.md

@@ -76,7 +76,7 @@ Clear (unload) named NPC. (requires ownership or server priv)
 
 Permanently unload and delete named NPC.  (requires server priv)
 
-### setskin npc_name skin_filename|random
+### setskin npc_name skin_filename | random
 
 Set the skin texture of the named NPC.
 

npcf/npcf.lua

@@ -393,7 +393,7 @@ function npcf:register_npc(name, def)
 							output:write(minetest.serialize(index))
 							io.close(output)
 						else
-							minetest.log("error", "Failed to add "..filename.." to npc index")
+							minetest.log("error", "Failed to add "..fields.name.." to npc index")
 						end
 						if luaentity.show_nametag then
 							add_nametag(luaentity)

npcf/npcs/npc_data/README.txt

@@ -0,0 +1,3 @@
+NPC data directory
+------------------
+NPC Backup data stored here.