Implemented basic acre transition functionality.
In the Player object, setTileX() and setTileY() were added to be used when transitioning to set the player's new tile coordinates. In the Thaed object, the Acre object was changed to a two-dimensional vector, the methods loadAcres() and destroyAcres() were created, acre integers and enumerations were added to be used to dynamically procure 2D acre vector data, and basic acre transition functionality was added. If the player moves down to the bottom of the screen, the next acre will be loaded into the memory. Likewise, if the player moves to the top of the screen, the acre will switch to the previous vertical acre. This functionality is not yet fully dynamic though.