Merge pull request #21 from jghibiki/leon

Leon's changes
Adds ability to do work inside Sent.and Mikie
Also renames Amazon to Tarzan to avoid using a registered trademark.
Changes the default values for the game class for progress required to 1
to allow for division (instead of 0 which throws and error).
Merge branch 'master' into ComputerSystem

Conflicts:
	game/Code/new_game_and_progress.rpy