Edit Maps

The map compression is finally working and most of the maps look good now!
As a result it is now possible to edit a map and write it back to the ROM.
Some examples:

Map Exit Area

I discovered two more data bytes for the map exits that hold the size of the exit area.
The correct size of an exit area is now displayed on the maps:

As for map editing I will need some more extra effort since the compression routine doesn't work for all of the maps yet.