changed door to use rectangle instead of point to define location, since a point does not have width or height, making it impractical for large doors
added basic support for changing zones by stepping into a door area
prevented the map from scrolling too far to the right or bottom when the
start spot is in that corner. i also fixed how small zones are handled to
center the map
added a shack / bomb shop to kakariko village to test the zone changing functionality
fixed some bugs regarding how zone transitions occur
moved files around to segregate them a bit more and to not have them all flood the root directory
removed some unreachable code