Savegame metadata

* Endianness: big
* Filename: 'world'
* Remarks: GZipped

Ord  Hex  Description
00   54   T
01   45   E
02   4D   S
03   44   V

04        Name of the world in UTF-8
...  00   String terminator

...       Terrain seed (8 bytes)
...       Randomiser seed (8 bytes)

...       SHA-256 hash of worldinfo1 when not compressed (32 bytes)
...       SHA-256 hash of worldinfo2 when not compressed (32 bytes)
...       SHA-256 hash of worldinfo3 when not compressed (32 bytes)
...       SHA-256 hash of worldinfo4 when not compressed (32 bytes)