Did a lot of leg work for the DirectionController.  Need to move
CoordinateObject from FloorPlanEditView to it's own class in model.
Right now the DirectionController will take in a 2d array of
CoordinateObject (which contains what is in what coordinate, Wall, Item,
Exhibit, Open Space) create a 2D int array, and run Dijkstra's algo on
it.  Right now it will output the path to the chosen item.  Sometime
tomorrow I will write a little function to see what exhibits/items are
on the way to give directions by "landmark"