Update

1) CreatePlaces has moved from being a testing class to a create all
objects class.
2) uploaded pngs
3) Door has become Gate
4) Created a LoadImage interface.  Allows Items, Places, and Payers to
load their images and send them to the MainWindow
5) Created Item class, for items that can be interacted with
6) created ItemMap to keep track of all items
7) Place now has a background image variable
8) Player no longer extends JPanel
9) WorldMap has a size variable
10) Test class TestGamePlay