Add support for MC 1.8 protocol

Lots of changes in 1.8 protocol so a new protocol handler was necessary
Packet (de)compression done with dotNetZip Zlib compression engine
1.4.6-1.7.10 support is still there thanks to app refactoring

MinecraftClient/Protocol/Handlers/ZlibUtils.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Ionic.Zlib;
+
+namespace MinecraftClient.Protocol.Handlers
+{
+    /// <summary>
+    /// Quick Zlib compression handling for network packet compression.
+    /// Note: Underlying compression handling is taken from the DotNetZip Library.
+    /// This library is open source and provided under the Microsoft Public License.
+    /// More info about DotNetZip at dotnetzip.codeplex.com.
+    /// </summary>
+
+    public static class ZlibUtils
+    {
+        /// <summary>
+        /// Compress a byte array into another bytes array using Zlib compression
+        /// </summary>
+        /// <param name="to_compress">Data to compress</param>
+        /// <returns>Compressed data as a byte array</returns>
+
+        public static byte[] Compress(byte[] to_compress)
+        {
+            ZlibStream stream = new ZlibStream(new System.IO.MemoryStream(to_compress, false), CompressionMode.Compress);
+            List<byte> temp_compression_list = new List<byte>();
+            byte[] b = new byte[1];
+            while (true)
+            {
+                int read = stream.Read(b, 0, 1);
+                if (read > 0) { temp_compression_list.Add(b[0]); }
+                else break;
+            }
+            stream.Close();
+            return temp_compression_list.ToArray();
+        }
+
+        /// <summary>
+        /// Decompress a byte array into another byte array of the specified size
+        /// </summary>
+        /// <param name="to_decompress">Data to decompress</param>
+        /// <param name="size_uncompressed">Size of the data once decompressed</param>
+        /// <returns>Decompressed data as a byte array</returns>
+
+        public static byte[] Decompress(byte[] to_decompress, int size_uncompressed)
+        {
+            ZlibStream stream = new ZlibStream(new System.IO.MemoryStream(to_decompress, false), CompressionMode.Decompress);
+            byte[] packetData_decompressed = new byte[size_uncompressed];
+            stream.Read(packetData_decompressed, 0, size_uncompressed);
+            stream.Close();
+            return packetData_decompressed;
+        }
+    }
+}