savegame: just json it

work_files/DataFormats/just-json-it-saveformat.md

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+Following code is an example savegame JSON files.
+
+#### savegame.json
+```
+{
+    savename: "Test World 1",
+    genver: <generator version in integer>,
+    terrseed: "84088805e145b555",
+    randseed: "19b25856e1c150ca834cffc8b59b23ad",
+    weatseed: "e5e72beb4e3c6926d3dc9e3e2ef7833b",
+    playerid: 9545698,
+    creation_t: <creation time in real-world unix time>,
+    lastplay_t: <creation time in real-world unix time>,
+    creation_t: <creation time in real-world unix time>,
+    thumb: <RFC-1924-encoded gzipped thumbnail image in TGA>,
+    
+    blocks: <BlockCodex serialised>,
+    items: <ItemCodex serialised>,
+    itemd: <DynamicItems serialised>,
+    wires: <WireCodex serialised>,
+    fluids: <FluidCodex serialised>,
+    materials: <MaterialCodex serialised>,
+    loadorder: <LoadOrder serialised>,
+    worlds: [1,2,6,7]
+}
+```
+
+#### world1.json
+
+File is named as `"world"+world_index+".json"`
+
+```
+{
+    worldname: "New World",
+    comp: <0 for uncompressed, 1 for GZip, 2 for LZMA>,
+    width: 8192,
+    height: 2048,
+    spawnx: 4096,
+    spawny: 248,
+    genver: <generator version in integer>,
+    time_t: <in-game TIME_T of this world>,
+    terr: {
+        s: 33554432,
+        h: "a441b15fe9a3cf56661190a0b93b9dec7d04127288cc87250967cf3b52894d11",
+        b: <RFC-1924-encoded gzipped terrain layerdata>
+    },
+    wall: {
+        s: 33554432,
+        h: <SHA-256 hash of 'b'>,
+        b: <RFC-1924-encoded gzipped wall layerdata>
+    },
+    tdmg: {
+        s: 8795,
+        h: <SHA-256 hash of 'b'>,
+        b: <RFC-1924-encoded gzipped terrain damage in JSON>
+    },
+    wdmg: {
+        s: 2,
+        h: <SHA-256 hash of 'b'>,
+        b: <RFC-1924-encoded gzipped wall damage in JSON>
+    },
+    flui: {
+        s: 15734
+        h: <SHA-256 hash of 'b'>,
+        b: <RFC-1924-encoded gzipped fluids in JSON>
+    },
+    wire: {
+        s: 2,
+        h: <SHA-256 hash of 'b'>,
+        b: <RFC-1924-encoded gzipped wiring nodes in JSON>
+    },
+    tmap: {
+        s: 4316,
+        h: <SHA-256 hash of 'b'>,
+        b: <RFC-1924-encoded gzipped tilenumber-to-tilename map in JSON>
+    }
+}
+```
+
+#### actors.json
+
+```
+{
+    <actor id>: { actor serialised in JSON },
+    ...
+}
+```