Added New Example For Generating A World

This is a new example that shows how to generate a chunk (Using prismarine-chunk) and send it to the user.

examples/server_world/mc.js

@@ -0,0 +1,47 @@
+const mc = require('minecraft-protocol');
+const Chunk = require('prismarine-chunk')("1.12.1");
+const Vec3 = require('vec3');
+var server = mc.createServer({
+  'online-mode': true,
+  encryption: true,
+  host: '0.0.0.0',
+  port: 25565,
+});
+var chunk = new Chunk();
+
+for (var x = 0; x < 16;x++) {
+  for (var z = 0; z < 16; z++) {
+    chunk.setBlockType(new Vec3(x, 100, z), 2);
+    for (var y = 0; y < 256; y++) {
+      chunk.setSkyLight(new Vec3(x, y, z), 15);
+    }
+  }
+}
+
+server.on('login', function(client) {
+  client.write('login', {
+    entityId: client.id,
+    levelType: 'default',
+    gameMode: 0,
+    dimension: 0,
+    difficulty: 2,
+    maxPlayers: server.maxPlayers,
+    reducedDebugInfo: false
+  });
+  client.write('position', {
+    x: 15,
+    y: 101,
+    z: 15,
+    yaw: 137,
+    pitch: 0,
+    flags: 0x00
+  });
+  client.write('map_chunk', {
+    x: 0,
+    z: 0,
+    groundUp: true,
+    bitMap: 0xffff,
+    chunkData: chunk.dump(),
+    blockEntities: []
+  });
+});