Modified format_objects to accept dicts or lists.
Added disclaimer to BaseRoom docstring.
valid_options returns the valid commands for that room.
Beginnings of the Player class.
Game-ending exceptions go here.
Added spaced_print utility function.
Added BaseTreasure and PoemTreasure classes.
Changed stat formatting to a property.
Added valid_options property to BaseRoom.
Added valid_options to PoemRoom and added property decorators to lots of properties.