Removed deprecated check_for_invalid_words()
Fixed a bug in thing scope detection.
Started implementing the player class.
Updated inventory updating.
Updated Docs for MS3 and implemented saving and loading.
Implemented takeable check when picking things up,
Implemented opening/closing doors, automatically opening them when going through and not being able to go through locked doors.
Locking/Unlocking doors (even automatically when passing through doors)
Bugfix in Condition.