Some MapObjects are now drawn on top of the ground again.
The camera now follows the player.

The screen aspect ratio is right when the screen is 512 pixels high and
wide.
GreenSlime can now be generated in the map editor.
Created a large (63x63) test map.
camera.update() is now called only when player moves.
createMap(int size) method
Area.setSize(int size) method
Refactoring into methods: Area.loadMap(mapFileName).
Removed hard-coded map size.
Add XmlReader
Merge branch 'tmxmaploader' into large-maps
Added import for IOException.
Renamed Tile[][] 'map' to 'tiles'.
Cleaned up code into methods.
Map size is now read from map file.
Renamed Area.createTiles to createMap.
Removed Area.setSize(). It's body is now executed in Area.createMap().
Merge branch 'large-maps' into moving-camera
Added new frame with texture from WGE2.
-> default screen resolution.