Savegame metadata

* Endianness: LITTLE
* Filename: 'worldinfo0'

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

04   01   Descriptor version number

05   03   Number of hashes

06        Name of the world in UTF-8 (arbitrary length, must not contain NULL)
n-1  00   String terminator

(Ord is now offset from n)

00        Terrain seed (8 bytes)
08        Randomiser s0 (8 bytes)
10        Randomiser s1 (8 bytes)
18        Weather s0 (8 bytes)
20        Weather s1 (8 bytes)

28        ReferenceID of the player (4 bytes, a fixed value of 91A7E2)
2C        Current world's time_t (the ingame time, 8 bytes)

34        Creation time in time_t (6 bytes)
3A        Last play time in time_t (6 bytes)
40        Total playtime in time_t (4 bytes)    // will record 136.1 years of playtime

44        SHA-256 hash of worldinfo1 (32 bytes)
72        SHA-256 hash of worldinfo2 (32 bytes)
A4        SHA-256 hash of worldinfo3 (32 bytes)

D6        Uncompressed size (2 bytes)
D8        Deflated thumbnail image in TGA format
p-2       (it's deflated so that it saves faster, so no Lzma)
p-2       0xFF
p-1       0xFE

Note: if you're going to add more footer beyond this point, DON'T;
      instead pack the thumbnail.tga and other footers in TEVD container.