Dialogue extended

-Dialogue has 'playerLine' in stead of saying the transforms name. The
Transform name is still the text used for options though!
- Added GO UPX key, X the number of levels to go back in the current
conversation.
- Added prefab for combined code/order item
- Added prefab for Forgery conversation
- Interactables now make a new instance of the conversation they have,
otherwise using prefabs wasn't working right.
- Puzzles should work all the way to selecting the right code in the
test forgery puzzle.