Worlds

[robertson-sean]

Adds mug item for when we implement thirst and puts content into book class that can change with user input(Combine with marker from BOB in future?)

[ajamesVISD]

We will take a look at how the World class is implemented here. I would like to see the main() method start with something like:

Room currentRoom = new World("crazyWorld");

Then all the adding rooms and so forth would happen in the World class.