* clean up chunk handling in chunk-handler deluxe -- it should now
get/set the appropriate chunks (numerically) from the gui
* clean up chunkloader deluxe gui to make more efficient use of space
* minor cleanup of world-gen for structures, disallow placement of
blocks/entities < 2y
* add fortress to village gen -- template is still WIP -- needs NPCs and
loot added
* add log cabin to village gen -- template is still WIP -- needs NPCs,
loot, paintings removed