Save to File
Load to File
Randomly Select a Texture
To Add:
Load Previous File
Final Layers
Foliage
Collision
The following video is a quick recording of the Map Editor in its current state. There is some lag in showing that the XML file is updated after save is pressed, though that's due to the system not the game, the save is instantaneous.
Textures are not all loaded yet so some test textures were used to demonstrate the random selection involved in displaying the zone.