Introduction quest 2

As I already mentioned in IRC, I use the same setup as it is used for the trigger which revents you from leaving the castle before completing the tutorial, which would be a much more troublesome place to fail the loading.
Which by the way also has some mix of underscore and camelcase: https://github.com/tales/sourceoftales/blob/master/scripts/npcs/village/guardfordwin.lua#L63