order inc files to folders

inc/entity/entity.npc.lua

@@ -0,0 +1,13 @@
+function NPC.talk_to()
+  local npc = Context.dialog.active_entity
+  if npc.dialog and npc.dialog.start then
+    PopupWindow.set_dialog_node("start")
+  else
+    -- if no dialog, go back
+    GameWindow.set_state(WINDOW_GAME)
+  end
+end
+function NPC.fight() end
+function NPC.go_back()
+  GameWindow.set_state(WINDOW_GAME)
+end