How do I record multiple touch inputs at the same time?

[Vincent]

1. Add this to input:
2. Add this to init: msg.post(".", "acquire_input_focus")
3. Add this to final: msg.post(".", "release_input_focus")
4. Add this to action:
   if action_id == hash("t") then for i, pos in ipairs(action.touch) do

This is what I use for my multiple touch games