put client login sequence in createClient.js

src/createClient.js

@@ -1,6 +1,8 @@
 'use strict';
 const assert = require('assert');
 const raknet = require('raknet');
+const fs = require("fs");
+const path = require("path");
 
 function createClient(options) {
   assert.ok(options, "options is required");
@@ -22,6 +24,25 @@ function createClient(options) {
     });
   };
 
+  client.on('login', function() {
+    client.writeMCPE("mcpe_login",
+      {
+        username: client.username,
+        protocol: 45,
+        protocol2: 45,
+        client_id: [ -1, -697896776 ],
+        client_uuid: '86372ed8-d055-b23a-9171-5e3ac594d766',
+        server_address: client.host+":"+client.port,
+        client_secret: new Buffer("e8 88 db 7b 9f f2 f0 44 a3 51 08 18 4e 8c 7f 9a".replace(/ /g,""),"hex"),
+        skin:
+        {
+          skinType: 'Standard_Steve',
+          texture: fs.readFileSync(path.join(__dirname,"texture"))
+        }
+      }
+    )
+  });
+
   return client;
 }